Information Circulars

INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS) INFORMATION CIRCULAR No. 173 (FEBRUARY 2011) NEW ORBITS ADS Name P (yr) T e W(2000) 2011 Author RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2012 ---------------------------------------------------------------------------------------- - FIN 333 33.31 1994.63 0.96 212.6 214.6 0.452 MASON & 02434-6643 10.8086 0.465 91.2 119.9 2010.9656 214.6 0.462 HARTKOPF 2397 STT 51 598. 2051.69 0.718 148.6 342.6 0.626 LING 03130+4417 0.6020 0.998 43.0 308.9 2009.700 343.4 0.614 - BU 1004 AB 410. 2066.69 0.244 145.4 59.1 1.206 DOCOBO 04021-3429 0.8781 1.452 160.2 160.8 2008.7676 58.0 1.200 & LING - HDS 521 21.64 1996.78 0.684 218.1 304.7 0.190 MASON & 04070-1000 16.6340 0.2261 122.5 76.5 2010.9657 295.2 0.183 HARTKOPF 3315 HU 1084 488. 1966.00 0.894 34.9 74.2 0.254 LING 04357+3944 0.7377 0.681 105.9 137.9 2008.8498 73.5 0.261 3748 A 484 37.61 2005.0 0.007 125.0 306.6 0.203 MASON & 05103-0736 9.5714 0.2058 101.7 113. 2010.9658 304.6 0.205 HARTKOPF 5092 B 114 59.64 1977.24 0.543 160. 5.6 0.636 MASON & 06274-2544 6.0360 0.4219 19.1 18. 2010.9796 7.7 0.630 HARTKOPF 5956 A 2123 AB 80.3 1981.10 0.940 135.9 354.2 0.395 MASON & 07171-1202 4.4825 0.641 77.8 79.2 2010.8950 355.0 0.391 HARTKOPF - B 1624 74.12 1997.78 0.2133 90.65 213.2 0.167 MASON & 08421-5245 4.8571 0.445 70.0 14.0 2010.9661 223.3 0.191 HARTKOPF - I 10 AB 146.97 2000.78 0.482 344.7 294.0 0.446 MASON 08447-5443 2.4495 2.002 105.6 8.5 2010.0658 281.1 0.404 7012 A 2552 82.4 1968.7 0.230 212.9 40.8 0.305 MASON & 08487+0057 4.3677 0.253 125.8 343. 2010.9659 39.1 0.307 HARTKOPF - HDO 207 AB 78.5 1968.2 0.843 215.1 93.3 0.144 MASON & 09128-0950 4.5863 0.343 78.7 80.5 2010.9662 96.1 0.139 HARTKOPF 7334 A 1342 AB 52.58 1963.4 0.052 202.6 200.9 0.160 MASON & 09228-0950 6.8469 0.1675 68.1 33. 2010.9690 203.7 0.160 HARTKOPF - FIN 349 40.99 1971.80 0.402 138.8 159.7 0.089 MASON & 09317+0152 8.7816 0.156 54.7 72.2 2010.9689 177.7 0.071 HARTKOPF - FIN 308 AB 65.2 1957. 0.022 249.8 102.6 0.144 MASON & 10282-2548 5.5200 0.176 51.8 291. 2010.9689 108.0 0.137 HARTKOPF 8094 STF 1517 AB 924. 1393.49 0.489 120.4 317.2 0.662 RICA 11137+2008 0.3896 2.278 93.6 256.5 2010.0649 316.9 0.671 - COU 1291 82.0 1969.44 0.434 140.7 303.9 0.280 DOCOBO 17075+3810 4.3902 0.221 61.3 326.7 2009.4303 305.0 0.284 & LING 15182 A 772 138.7 1999.56 0.549 42.8 77.1 0.131 DOCOBO & 21395+3009 2.5963 0.198 152.7 233.7 2010.504 72.9 0.138 TAMAZIAN 15843 BU 1216 503. 1837.83 0.833 23.9 278.2 0.872 LING 22202+2931 0.7157 0.774 130.1 289.9 2009.755 278.0 0.874 ========================================================================================== PAPERS PUBLISHED IN 2010 1. ABT, H. A.: The Origin of the Exoplanets. Pub. Astron. Soc. of the Pacific 122, 1015 (2010). 2. ALLEN, C. et al: Commission 26: Double and Multiple Stars. Transactions IAU, 6, (T27) 191 (2010). 3. ALLERS, K. N. et al. : Discovery of A Young L Dwarf Binary, SDSS J224953.47+004404.6 AB. Astrophys. J. 715, 561 (2010). 4. BALEGA, I. I., BALEGA, Y. Y. & MALOGOLOVETS, E. V.: Orbits of new Hipparcos binaries: III. Astrophys. Bull. 65 (3), 250 (2010). 5. BERNAT, D. et al. : A Close Companion Search Around L Dwarfs Using Aperture Masking Interferometry and Palomar Laser Guide Star Adaptive Optics. Astrophys. J. 715, 724 (2010). 6. BORKOVITS, T., PARAGI, Z. & CSIZMADIA, S.: On the formation of close binaries - an interferometric look on Algol(s). J. of Physics Conf. Ser. 218, 2005 (2010). 7. BROZ, M. et al.: A Unified Solution for the Orbit and Light-time E®ect in the V505 Sgr System. Astron. J. 139, 2258 (2010). 8. CABALLERO, J. A. et al.: The magnetically-active, low-mass, triple system WDS 19312+3607 (Research Note). Astron. Astrophys. 520, 91 (2010). 9. CVETKOVIC, Z. & NINKOVIC, S.: On the Component Masses of Visual Binaries. Serbian Astron. J. 180 71 (2010). 10. CVETKOVIC, Z. & NOVAKOVIC, B.: Eight new and three recalculated orbits for binaries. Astron. Nach. 331 304 (2010). 11. CVETKOVIC, Z.; PAVLOVIC, R. & BOEVA, S.: CCD Measurements of Double and Multiple Stars at NAO Rozhen. IV. Serbian Astron. J. 180 103 (2010). 12. CVETKOVIC, Z.; VINCE, I. & NINKOVIC, S.: A new orbit of binary 15 Monocerotis. New Astron. 15, 302 (2010). 13. CVETKOVIC, Z., PAVLOVIC, R. & NINKOVIC, S.: A New Recalculated Orbit for the Visual Binary CHR 90. Astron. J. 140 25 (2010). 14. DOCOBO, J. A. et al.: EMCCD Speckle Interferometry with the 6 m Telescope: Astrometric Measurements, Di®erential Photometry, and Orbits. Astron. J. 140, 1078 (2010). 15. DUPUY, T. J. et al. : Studying the Physical Diversity of Late-M Dwarfs with Dynamical Masses. Astrophys. J. 721, 1725 (2010). 16. EGGLETON, P. P.: Evolution of intermediate and low mass binary systems. New Astron. Rew. 54, 45 (2010). 17. FARRINGTON, C. D. et al.: Separated Fringe Packet Observations with the CHARA Array. I. Methods and New Orbits for Â Draconis, HD 184467, and HD 198084. Astron. J. 139, 2308 (2010). 18. FEKEL, F. C. & Williamson, M. H.: New Precision Orbits of Bright Double-lined Spectroscopic Binaries. V. The Am Stars HD 434 and 41 Sextantis. Astron. J. 140, 1381 (2010). 19. FEKEL, F. C., TOMKIN, J. & Williamson, M. H.: New Precision Orbits of Bright Double- lined Spectroscopic Binaries. IV. 66 Andromedae, HR 6979, and HR 9059. Astron. J. 139, 1579 (2010). 20. FEKEL, F. C. et al.: Infrared Spectroscopy of Symbiotic Stars. VIII. Orbits for Three S-Type Systems: AE Arae, Y Coronae Australis, and SS 73-147. Astron. J. 139, 1315 (2010). 21. GIES, D. et al.: Massive Star Studies with the CHARA Array. Rev. Mex. A. A. Conf Ser 38, 133 (2010). 22. GRIFFIN, R. F.: Spectroscopic binary orbits from photoelectric radial velocities - Spectroscopic binary orbits from photoelectric radial velocities - Paper 210: Psi2 Aurigae and 34 Pegasi. The Observatory 130, 17 (2010). 23. GRIFFIN, R. F.: Spectroscopic binary orbits from photoelectric radial velocities - Spectroscopic binary orbits from photoelectric radial velocities - Paper 211: HD 128642, HD 144601, HD 150172, and HD 155641. The Observatory 130, 75 (2010). 24. GRIFFIN, R. F.: Spectroscopic binary orbits from photoelectric radial velocities - Spectroscopic binary orbits from photoelectric radial velocities - Paper 212: HD 113449, HD 113762, HD 113880, and HD 119944. The Observatory 130, 125 (2010). 25. GRIFFIN, R. F.: Spectroscopic binary orbits from photoelectric radial velocities - Spectroscopic binary orbits from photoelectric radial velocities - Paper 213: HD 179332, HD 181386, and their visual companions. The Observatory 130, 232 (2010). 26. GRIFFIN, R. F.: Spectroscopic binary orbits from photoelectric radial velocities - Spectroscopic binary orbits from photoelectric radial velocities - Paper 214: HR 6790, HR 6886, HR 6901, and HR 7137. The Observatory 130, 299 (2010). 27. GRIFFIN, R. F.: Spectroscopic binary orbits from photoelectric radial velocities - Spectroscopic binary orbits from photoelectric radial velocities - Paper 215: HD 105074, HD 105182, HD 108613, and HD 115445. The Observatory 130, 349 (2010). 28. GRIFFIN, R. F. & FILIZ, A. N.: Orbits of six late-type active-chromosphere binaries. Astrophys. Space Science 330, (1), 47 (2010). 29. GRIFFIN, R. E. M. & GRIFFIN, R. F.: Composite spectra Paper 16: HR 3222, a 2.5-yr binary with a metallic-line secondary. Mont. Not. RAS 402, 1675 (2010). 30. GROH, J. H. et al.: Detection of high-velocity material from the wind-wind collision zone of Eta Carinae across the 2009.0 periastron passage. Astron. Astrophys. 517, A9 (2010). 31. HARTKOPF, W. I.: Hot Binaries: Observational Results. Rev. Mex. A. A. 38 19 (2010). 32. HELMINIAK, K. & KONACKI, M.: Precise Astrometry of Visual Binaries with Adaptive Optics. A way for ¯nding exoplanets?. EAS Publ. Ser. 41, 103 (2010). 33. HINKLE, K. H., FEKEL, F. C. & JOYCE, R. R.: Symbiotic Stars: Infrared Spectroscopy and Orbits. Bull. AAS 42, 268 (2010). 34. HORCH, E. P. et al: CCD Speckle Observations of Binary Stars with the WIYN Telescope. VI. Measures During 2007-2008. Astron. J. 139, 205 (2010). 35. HOWELL, S. B. et al: Kepler Observations of Three Pre-launch Exoplanet Candidates: Discovery of Two Eclipsing Binaries and a New Exoplanet. Astrophys. J. 725, 1633 (2010). 36. IZMAILOV, I. S. et al.: Astrometric CCD Observations of Visual Double Stars at the Pulkovo Observatory. Astron. Letters 36, (5) 349 (2010). 37. KIYAEVA, O. V, GORYNYA, N.A. & IZMAILOV I. S.: Astrometric study of the relative motion of three stars with possible invisible companions based on homogeneous series obtained at Pulkovo with a 26-inch refractor. Astron. Letters 36, (3) 204 (2010). 38. KONACKI, M. et al. : High-precision Orbital and Physical Parameters of Double-lined Spectroscopic Binary StarsHD78418, HD123999, HD160922, HD200077, and HD210027. Astrophys. J. 719, 1293 (2010). 39. LING, J. F.: First Orbit Solutions and Calculated Masses of 10 Visual Binaries. Astron. J. 139, 1521 (2010). 40. LIU, M. C., DUPUY, T. J. & LEGGETT, S. K.: Discovery of a Highly Unequal-mass Binary T Dwarf with Keck Laser Guide Star Adaptive Optics: A Coevality Test of Substellar Theoretical Models and E®ective Temperatures. Astrophys. J. 722, 331 (2010). 41. LOSSE, F.: Double stars measurements: 2009-2010 campaing. Obs. & Trav. 75, 17 (2010). 42. MARTYNOVA, A. I. & ORLOV, V. V.: Analysis of regions of stability in the vicinity of a new periodic S orbit in the three-body problem. Astron. Reports 54, (9) 797 (2010). 43. MASON, B. D, HARTKOPF, W. I. & McALISTER, H. A.: Binary Star Orbits. III. Revisiting the Remarkable Case of Tweedledum and Tweedledee. Astron. J. 140, 242 (2010). 44. MASON, B. D, HARTKOPF, W. I. & WYCOFF, G. L.: Speckle Interferometry at the U.S. Naval Observatory. XV. Astron. J. 140, 480 (2010). 45. MASON, B. D, HARTKOPF, W. I. & TOKOVININ, A. A.: Binary Star Orbits. IV. Orbits of 18 Southern Interferometric Pairs. Astron. J. 140, 753 (2010). 46. MELIKIAN, N. D. et al.: Spectral observations of the eclipsing binary RY Sct. Astroph. 53 (2), 202 (2010). 47. MELIKIAN, N. D. et al.: Spectral and photometric observations of TT Ari. III. Astroph. 53 (3), 373 (2010). 48. MILIC, I. S. & CVETKOVIC, Z.: Correlations of Orbital Elements for Visual Double Stars. Serbian Astron. J. 181 69 (2010). 49. MUTERSPAUGH, M. W. et al.: The Phases Di®erential Astrometry Data Archive. I. Measurements and Description. Astron. J. 140, 1579 (2010). 50. MUTERSPAUGH, M. W. et al.: The Phases Di®erential Astrometry Data Archive. II. Updated Binary Star Orbits and a Long Period Eclipsing Binary. Astron. J. 140, 1623 (2010). 51. MUTERSPAUGH, M. W. et al.: The Phases Di®erential Astrometry Data Archive. III. Limits to Tertiary Companions. Astron. J. 140, 1631 (2010). 52. MUTERSPAUGH, M. W. et al.: The Phases Di®erential Astrometry Data Archive. IV. The Triple Star Systems 63 Gem A and HR 2896. Astron. J. 140, 1646 (2010). 53. MUTERSPAUGH, M. W. et al.: The Phases Di®erential Astrometry Data Archive. V. Candidate Substellar Companions to Binary Systems. Astron. J. 140, 1657 (2010). 54. ORLOV, V. G. et al.: Speckle Interferometry at the Observatorio Astronomico Nacional. II Rev. Mex. A. A. 46, 245 (2010). 55. PRIEUR, R. J. et al: Speckle observations with PISCO in Merate - IX. Astrometric measurements of visual binaries in 2008. Mont. Not. RAS 407, 1913 (2010). 56. RAGHAVAN, D.: A Survey of Stellar Families: Multiplicity of Solar-type Stars. Astrophys. J. Sup. Ser. 190 (1), 1 (2010). 57. REIPURTH, B. et al: Orphaned Protostars. Astrophys. J. L. 725, 56 (2010). 58. RICA, F. M.: Orbital elements for eight binaries. Study of the nature of wide components. I. Rev. Mex. A. A. 46 263 (2010). 59. RIEDEL, A. R. et al: The Solar Neighborhood. XXII. Parallax Results from the CTIOPI 0.9 m Program: Trigonometric Parallaxes of 64 Nearby Systems with 0".5 < mu < 1".0 yr-1 (SLOWMO Sample). Astron. J. 140, 897 (2010). 60. SCARDIA, R. et al: Speckle observations with PISCO in Merate: VIII. Astrometric measurements of visual binaries in 2007 and new orbits of the multiple system Zeta Aqr. Astron. Nach. 331, 286 (2010). 61. SCHAEFER, G. et al: Masses and Distance to the Young Triple Star Elias 12. Bull. AAS 42, 354 (2010). 62. SHAKHT, N. A. et al.: Orbit determination and estimate of the component masses. Astroph. 53 (2), 227 (2010). 63. ZASCHE, P. & UHLAR, R.: The triple system KR Comae Berenices. Astron. Astroph. 519A, 78 (2009). 64. ZHUCHKOV, R. Y. et al.: Physical and dynamical parameters of the multiple system HD 222326. Astron. Reports 52, (7) 546 (2010). 65. ZHUCHKOV, R. Y. et al.: Physical parameters and dynamical properties of the multiple star o And. Astron. Reports 54, (12) 1134 (2010). 66. ZHUCHKOV, R. Y., KIYAEVA, O. V. & ORLOV, V. V.: Criteria for the stability of triple systems and their application to observations of multiple stars. Astron. Reports 54, (1) 38 (2010). ****************************************************************************************** The deadline for contributions to Information Circular No. 174 is: June 15th 2011 J. A. Docobo (joseangel.docobo@usc.es) J. F. Ling (josefinaf.ling@usc.es) Tel: +34 981592747 Fax: +34 981597054 Observatorio Astronomico "R. M. Aller" P. O. Box 197 Universidade de Santiago de Compostela SPAIN http://www.usc.es/astro ISSN: 1024-7769

INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS) INFORMATION CIRCULAR No. 174 (JUNE 2011) NEW ORBITS ADS Name P (yr) T e W(2000) 2011 Author RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2012 ---------------------------------------------------------------------------------------- 17178 HLD 60 223.2 1903.08 0.648 324.7 168.9 1.286 HARTKOPF 00014+3937 0.1774 0.880 128.3 325.7 2009.7330 168.6 1.290 & MASON - HDS 93 94.28 2006.69 0.226 50.7 43.7 0.265 CVETKOVIC 00428+1249 3.8185 0.339 134.5 343.6 2007.0092 39.4 0.265 709 STF 67 4133. 1741. 0.908 216. 349.9 2.272 HARTKOPF 00521+1036 0.0871 5.982 113.3 102.0 2008.8876 349.8 2.274 & MASON 1406 STF 158AB 2239. 2089.7 0.764 278. 272.2 2.055 HARTKOPF 01467+3310 0.1608 5.351 78.8 65. 2008.8663 272.4 2.049 & MASON 1632 A 957 219.97 1870.07 0.462 107.7 14.3 0.375 ZIRM 02048+6030 1.6366 0.471 125.3 250.1 1997.04 12.9 0.374 & RICA - FIN 312 2.653 2009.66 0.226 105.3 309.6 0.128 DOCOBO & 02396-1152 135.6903 0.106 24.0 25.1 2009.671 68.9 0.088 ANDRADE 2273 A 1530 127.9 2020.7 0.739 79.3 73.7 0.267 HARTKOPF 03005+3934 2.8147 0.492 83.1 78.7 2008.8582 74.5 0.262 & MASON 2468 HJ 663 2029. 2283. 0.26 97. 201.0 2.150 ROBERTS 03128-0112 0.1774 9.87 104. 342. 2002.6845 200.2 2.141 & HARTKOPF - BU 787AB 655.84 2264.91 0.261 130.5 292.8 4.659 CVETKOVIC 03342+4837 0.5489 4.988 70.0 291.6 2010.6900 293.0 4.677 - DAW 79 97.138 1999.55 0.703 155.1 142.7 0.399 MASON & 04024-2832 3.7061 0.454 130.3 249.8 2010.5864 140.6 0.416 HARTKOPF - HEI 35 28.91 2000.53 0.832 165.9 333.2 0.446 RICA 04102+1722 12.4524 0.282 115.7 35.9 2008.6915 332.1 0.449 & ZIRM - RST5501 84.428 2004.43 0.516 219.3 202.0 0.146 MASON & 04545-0314 4.2640 0.241 120.7 311.2 2010.0652 196.9 0.146 HARTKOPF 3822 HU 1224 1656. 2111. 0.77 100. 114.5 1.032 HARTKOPF 05148+1232 0.2174 2.3 105.0 71. 2009.1230 114.3 1.031 & MASON 5172 A 670 150.438 1989.53 0.689 177.5 175.8 0.363 MASON & 06319-0938 2.3930 0.360 63.9 222.0 2010.0656 176.5 0.374 HARTKOPF 5571 A 2833 209.09 1987.13 0.927 107.2 138.9 0.411 ZIRM 06549+1158 1.7218 0.429 43.1 240.7 2004.2034 139.4 0.420 & RICA - I 7 85.204 1958.74 0.967 237.7 204.5 0.733 MASON & 07175-4659 4.2252 1.001 102.9 248.5 2010.0656 204.1 0.720 HARTKOPF 6138 A 2869 156.116 1996.23 0.785 302.7 123.2 0.192 MASON & 07305+0743 2.3060 0.230 149.0 45.7 2010.9688 121.6 0.201 HARTKOPF 7316 A 1082AB 212.7 1987.66 0.644 5.0 210.3 0.436 DOCOBO 09207-0742 1.6925 0.600 127.0 24.2 2009.2652 208.9 0.453 & LING 7380 STF1355 591. 2139.52 0.623 146.4 353.5 1.854 LING 09273+0614 0.6091 1.733 51.1 2.8 2009.2597 353.7 1.843 8230 STF1554 478.88 1962.44 0.902 84.6 214.1 0.281 ZIRM 11361+1251 0.7518 0.868 74.8 308.6 2004.2068 214.9 0.288 & RICA 8547 BU 606 707.61 2009.44 0.383 100.1 289.7 0.524 RICA 12260-1457 0.5088 1.441 96.9 123.6 2006.1997 289.3 0.539 & ZIRM - HJ 4539AB 83.35 1931.25 0.793 187.9 298.0 0.19 ALZNER 12415-4858 4.3191 0.869 113.7 2.6 2010.63 266.9 0.14 & ARGYLE - FIN 369 25.25 1999.19 0.374 20.1 287.9 0.069 CVETKOVIC 13320-6519 14.2572 0.152 71.4 95.0 2009.2627 309.3 0.070 - FIN 369 24.77 1998.89 0.377 19.2 292.9 0.065 DOCOBO & 13320-6519 14.5337 0.155 72.2 93.1 2009.2627 314.6 0.071 ANDRADE 9025 STT 270 996. 2035. 0.76 174. 51.9 2.011 ROBERTS 13473+1727 0.3614 8.01 49. 322. 2001.0994 54.5 1.945 & MASON - I 952 99.13 1981.39 0.659 27.1 322.4 0.707 RICA 14531-4638 3.6316 0.521 156.1 268.1 2009.2602 321.1 0.716 & ZIRM 9473 HU 907 259.8 2123.28 0.290 157.5 279.3 0.228 LING 15002+2129 1.3857 0.339 62.2 272.0 2009.4413 280.7 0.230 - CHR 259 33.75 2003.87 0.747 44.0 162.5 0.226 CVETKOVIC 15496-0326 10.6679 0.255 128.5 98.6 2009.2658 157.1 0.235 - LAB 4 14.82 1990.10 0.058 16.4 346.4 0.047 DOCOBO & 16341+4226 24.2915 0.114 102.0 278.9 2010.498 278.1 0.025 TAMAZIAN 10425 STT 327 88.402 1968.19 0.653 146.4 332.2 0.453 MASON & 17141+5608 4.0723 0.278 57.3 12.3 2010.5081 332.8 0.452 HARTKOPF - COU 415 94.449 1989.72 0.383 129.3 247.6 0.251 MASON & 17221+2310 3.8116 0.308 135.2 125.5 2009.4388 243.9 0.252 HARTKOPF - B 912 132.256 1944.75 0.113 226.8 171.9 0.256 MASON & 17308-3726 2.7220 0.297 44.9 116.2 2010.5856 174.5 0.259 HARTKOPF 12746 HU 953 282.797 2002.84 0.686 184.4 40.0 0.261 MASON & 19389+3514 1.2730 0.680 30.8 156.0 2007.6016 45.2 0.270 HARTKOPF 14126 STT 410AB 1408. 1708. 0.67 203. 4.2 0.865 HARTKOPF 20396+4035 0.2557 0.751 126. 63. 2008.8575 4.1 0.866 & MASON 14889 STT 437AB 1421. 1789.6 0.759 255. 19.5 2.410 HARTKOPF 21208+3227 0.2533 2.589 141.0 97.0 2008.8685 19.3 2.415 & MASON 15007 STF2799AB 978. 1735. 0.530 187. 259.7 1.853 HARTKOPF 21289+1105 0.3681 2.098 131.0 133. 2009.6550 259.5 1.858 & MASON 15007 STF2799AB 1140.01 2880.08 0.335 23.8 260.2 1.833 CVETKOVIC 21289+1105 0.3158 1.860 151.6 357.8 2010.6874 260.0 1.837 - HDO 296AB 27.57 1993.45 0.546 100.6 107.5 0.288 DOCOBO & 21552-6153 13.0577 0.273 82.9 206.3 2009.755 108.8 0.252 CAMPO - WOR 11 130.21 2049.06 0.101 19.0 237.9 1.434 CVETKOVIC 22234+3228 2.7648 1.610 43.3 343.9 2010.6871 240.4 1.407 16923 HO 303AB 112.6 1958.38 0.609 4.1 185.5 1.031 DOCOBO 23409+2022 3.1972 1.112 89.0 58.3 2009.687 185.6 1.008 & LING - RST4136AB 53.81 1999.31 0.038 17.1 205.4 0.171 DOCOBO & 23586-1408 6.6902 0.205 102.5 63.5 2009.671 203.5 0.183 CAMPO 17149 STF3050AB 717. 1992.3 0.215 185.2 336.9 2.278 HARTKOPF 23595+3343 0.5021 3.856 61.9 116.4 2009.8430 337.6 2.301 & MASON ========================================================================================== NEW LINEAR FITS ADS Name X0 Xa rho_0 T0 2011 Author RA 2000 DEC - Y0 Ya theta_0 Last ob. 2012 ---------------------------------------------------------------------------------------- 337 HJ 621 -2.322987 0.049777 3.120 1955.128 5.1 5.205 CVETKOVIC 00251+1824 - -2.083223 -0.055505 311.89 2010.6844 5.5 5.265 - BU 787 AB -1.744095 -0.020860 2.258 1878.073 292.0 4.872 CVETKOVIC 03342+4837 - 1.467897 -0.024785 229.91 2010.6900 292.2 4.901 17130 HJ 995 3.715886 0.042847 4.043 1948.823 125.9 7.877 CVETKOVIC 23581+2840 - -1.593434 0.099919 66.79 2010.6900 126.3 7.970 ========================================================================================== INFORMATIVE NOTE In the Binaries Workshop held in Santiago de Compostela in February 2011, Drs. Scardia and Prieur (as representatives of the PISCO group) presented a request to the IAU Commission 26 with the intention that it would be sent to the Cote d'Azur Observatory (OCA), asking for necessary support for their group in terms of obtaining automatic speckle measurements with a dedicated computer-controlled 1 meter telescope that belongs to OCA. The Commission 26 staff (8 people) approved the proposal by a majority vote. The Director of the OCA responded that he would make all of the arrangements necessary in order to be able to satisfy IAU recommendations. J. A. Docobo President IAU Commission 26 ****************************************************************************************** The deadline for contributions to Information Circular No. 175 is: October 15th 2011 J. A. Docobo (joseangel.docobo@usc.es) J. F. Ling (josefinaf.ling@usc.es) Tel: +34 981592747 Fax: +34 981597054 Observatorio Astronomico "R. M. Aller" P. O. Box 197 Universidade de Santiago de Compostela SPAIN http://www.usc.es/astro ISSN: 1024-7769

INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS) INFORMATION CIRCULAR No. 175 (OCTOBER 2011) NEW ORBITS ADS Name P (yr) T e W(2000) 2011 Author RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2012 ---------------------------------------------------------------------------------------- - COU 247 160.0 2002.05 0.256 19.2 246.4 0.330 DOCOBO & 00095+1907 2.2500 0.573 129.4 86.1 2010.635 242.4 0.342 TAMAZIAN - HDS 169 143.73 2115.16 0.575 102.7 238.4 0.625 HARTKOPF 01166+1831 2.5048 0.767 118.3 93.9 2010.8971 236.9 0.622 & MASON - HDS 272 138.54 2074.75 0.513 89.6 334.5 0.573 HARTKOPF 02022-2402 2.5985 0.970 111.1 274.2 2010.9655 332.2 0.582 & MASON - RST2272 549.83 2050.09 0.671 252.9 235.7 1.445 HARTKOPF 02039-4525 0.6548 3.233 74.2 54.2 2011.0393 236.3 1.450 & MASON - HDS 357 78.70 2041.99 0.401 160.8 60.0 0.330 HARTKOPF 02456-7114 4.5744 0.545 116.1 256.6 2010.9656 55.0 0.332 & MASON 2111 BU 83 716.26 2418.03 0.510 147.7 13.6 0.955 HARTKOPF 02460-0457 0.5026 2.380 101.4 290.2 2010.9655 13.1 0.963 & MASON - B 1474 102.78 1953.13 0.050 121.6 278.7 0.301 HARTKOPF 04502-3113 3.5025 0.289 14.9 315.7 2010.9657 281.8 0.301 & MASON - RST2375 278.90 2003.66 0.441 150.5 22.0 0.159 HARTKOPF 05190-2159 1.2908 0.463 60.0 221.7 2010.9659 27.1 0.153 & MASON - DAW 85 65.52 1999.56 0.788 125.2 310.1 0.349 HARTKOPF 05330-2415 5.4943 0.286 168.1 24.0 2010.9659 308.0 0.365 & MASON - HU 1568 307.49 2021.62 0.391 171.3 151.9 0.472 HARTKOPF 05418-5000 1.1708 1.025 109.5 76.7 2010.9795 150.1 0.450 & MASON - FIN 19Aa,Ab 28.77 1993.25 0.436 157.7 353.4 0.260 HARTKOPF 06359-3605 12.5130 0.309 101.8 287.1 2010.9659 350.4 0.284 & MASON - FIN 322 58.18 1968.78 0.282 241.0 281.0 0.089 HARTKOPF 06493-0216 6.1872 0.145 113.2 62.9 2010.9659 275.3 0.095 & MASON - I 1070AB 3255.23 2018.39 0.950 205.6 26.5 0.137 HARTKOPF 07598-4718 0.1106 1.777 65.6 257.0 2010.9685 29.1 0.126 & MASON 6981 AG 154 1162.85 3009.92 0.643 183.8 1.0 2.657 HARTKOPF 08369+2315 0.3096 3.124 95.1 81.0 2010.9688 1.0 2.660 & MASON - RST2593 159.72 2061.33 0.215 190.1 337.9 0.950 HARTKOPF 08563-3707 2.2540 0.914 143.3 351.6 2011.0370 336.3 0.939 & MASON 7662 A 2145 80.59 1991.25 0.812 160.7 244.2 0.170 MASON & 10093+2020 4.4669 0.152 139.5 113.7 1995.1438 242.7 0.175 HARTKOPF - RST4454AB 164.55 1957.19 0.306 221.3 222.8 0.294 HARTKOPF 10183-0326 2.1878 0.273 86.9 243.1 2010.9689 222.9 0.292 & MASON 8128 STF1527 551.36 2010.22 0.881 184.3 196.0 0.307 SCARDIA 11190+1416 0.6529 2.624 53.9 2.6 2010.395 209.7 0.296 ET AL. (*) - FIN 54 347.86 2245.05 0.716 119.6 207.2 0.252 HARTKOPF 13072-5420 1.0349 0.670 119.6 106.2 2011.0400 205.9 0.253 & MASON 8914 STT 266 1954.11 1852.79 0.502 166.4 357.0 2.003 HARTKOPF 13284+1543 0.1842 3.384 72.8 132.1 2011.0374 357.2 2.002 & MASON - B 2036AB 227.78 1985.94 0.567 7 181.2 1.3 0.357 HARTKOPF 15313-3349 1.5805 0.444 90.9 67.0 2011.3029 1.3 0.366 & MASON - COU 612 63.09 2035.01 0.401 155.9 173.8 0.289 DOCOBO 15390+2545 5.7061 0.223 138.8 136.1 2009.4413 171.5 0.288 & LING - MCA 42CE 38.77 1993.96 0.025 5.4 328.8 0.112 DOCOBO 16054-1948 9.2855 0.124 41.8 155.8 2009.263 336.9 0.117 & CAMPO - FIN 354 50.16 2014.57 0.093 82.9 262.7 0.112 DOCOBO & 16115+0943 7.1770 0.122 92.2 214.7 2009.263 262.4 0.109 ANDRADE - CHR 54 35.67 2011.21 0.774 56.4 282.7 0.011 LING 16229-1701 10.0925 0.185 100.6 125.5 2010.4784 232.5 0.058 10385 HU 169 79.14 1992.09 0.458 22.1 191.9 0.245 DOCOBO 17115-1630 4.5489 0.217 125.5 63.0 2008.5397 190.1 0.248 & LING 11127 BU 132AB 3021.10 1936.97 0.599 192.0 188.2 1.393 HARTKOPF 18112-1951 0.1192 3.182 116.1 327.5 2011.2893 188.0 1.394 & MASON 14526 MCA 65Aa,Ab 161.5 2024.3 0.261 205.2 354.3 0.156 MASON 20598+4731 2.2296 0.208 145.8 265.5 2008.4509 351.1 0.153 (*) SCARDIA, PRIEUR, PANSECCHI & ARGYLE ========================================================================================== NEW LINEAR FITS Authors: FRIEDMAN, E.A., MASON, B.D. & HARTKOPF, W.I. ADS Name X0 Xa rho_0 T0 2011 RA 2000 DEC - Y0 Ya theta_0 Last ob. 2012 ---------------------------------------------------------------------------------------- 17175 BU 733AD -30.970873 -0.859028 41.335 1842.9500 307.7 220.590 00022+2705 - 27.374418 -0.971887 228.53 1998.7500 307.8 221.864 - I 438BC 0.450788 -0.070674 1.333 1898.1310 241.2 8.506 00276-3157 - 1.254735 0.025391 160.24 1998.7500 241.3 8.580 - ENG 7 -15.407104 -0.593044 40.548 2039.2070 177.5 44.663 01477+6351 - 37.507088 -0.243610 202.33 2003.8700 178.3 44.398 - ENG 9AB 11.881812 -0.240921 14.453 2216.4419 135.9 88.548 01591+3313 - -8.228194 -0.347899 55.30 2002.7040 135.9 88.131 2383 H 5 117AC -12.157592 -0.061803 13.730 1867.1040 296.5 23.446 03112+2225 - 6.380237 -0.117765 242.31 2010.6200 296.7 23.554 - HJ 2194 -2.341482 0.055625 7.230 1438.3190 121.0 34.380 03314+0131 - 6.840384 0.019041 198.90 2003.0740 121.0 34.438 3093 STF 518AD 29.253775 2.264239 35.189 1881.2720 37.6 525.612 04153-0739 - 19.557575 -3.386797 123.76 1998.8700 37.6 529.677 3093 STF 518AE -74.164978 2.239836 88.650 1861.0400 24.9 615.479 04153-0739 - -48.562584 -3.420686 303.22 1998.8700 25.0 619.526 - HJ 351AB 7.571932 0.046198 10.333 1788.3190 77.4 18.256 04550+3411 - 7.031074 -0.049752 132.88 2004.0900 77.2 18.312 3886 STFB 3AC -26.616661 -0.523136 33.911 1905.3170 300.7 94.665 05191+4006 - 21.011721 -0.662684 231.71 1999.9900 300.9 95.453 - BLL 16 37.474773 -0.489587 52.680 2081.6970 88.8 72.592 05460+3717 - -37.024433 -0.495542 45.35 2007.2679 88.4 72.115 - STF 892 32.207527 -0.009910 34.064 1355.9041 40.7 39.454 06195+1220 - -11.092638 -0.028773 71.00 2007.0649 40.7 39.469 - HJ 388 -4.513659 0.034228 8.191 1416.6219 142.0 25.681 06269+2951 - 6.834824 0.022604 213.44 2005.2440 142.0 25.719 - KUI 51AC 12.936215 -0.287673 14.038 1961.1350 358.3 38.819 10365-1214 - -5.452597 -0.682500 67.14 2007.2050 358.0 39.511 - STI 714 -1.688840 0.022737 2.440 1641.1420 34.3 11.872 10456+6250 - -1.761501 -0.021799 316.21 2000.2610 34.4 11.903 8250 STF1561AE -0.179783 0.559438 57.382 2056.2759 335.5 62.951 11387+4507 - -57.381424 -0.001753 359.82 2009.4840 336.0 62.723 8250 STF1561BC -0.001742 0.584671 3.973 1707.5031 88.7 176.906 11387+4507 - -3.973470 -0.000256 359.97 2009.4840 88.7 177.490 - STT 576AB -6.484517 -0.737788 19.883 1593.9280 285.5 325.336 11507+0146 - 18.796144 -0.254531 199.03 1984.3000 285.5 326.115 - STT 578 -61.849041 0.810116 83.229 1935.2770 180.6 122.925 13119+2753 - 55.693901 0.899648 228.00 1924.2500 180.2 123.819 8841 BU 800AC 33.207432 -0.640518 86.861 1878.7070 336.1 125.807 13169+1701 - -80.262177 -0.265006 22.48 1999.9500 335.9 126.309 9212 BU 1246AC 19.498384 0.344018 26.951 1842.7540 118.4 87.592 14190-2549 - -18.605721 0.360523 46.34 1999.2200 118.5 88.066 - STF1845 3.969837 -0.080821 7.667 1548.0780 311.1 44.306 14237+6156 - -6.559544 -0.048913 31.18 2007.4449 311.1 44.399 9413 STF1888AD -18.767683 -0.420808 37.684 1686.9120 286.4 161.251 14514+1906 - 32.677612 -0.241682 209.87 2008.3110 286.4 161.723 - SKF 10 -8.517613 0.102674 9.797 2052.5930 282.5 13.203 15111+4424 - 4.840978 0.180653 240.39 2007.5179 281.8 13.064 - POU3216 -6.438280 -0.044088 7.687 1866.0560 293.4 13.929 16134+2431 - 4.199899 -0.067585 236.88 2003.3300 293.6 13.996 - STF2042 -0.462005 -0.106478 5.835 2090.4360 128.7 10.386 16258+0542 - 5.816632 -0.008457 184.54 2007.4399 129.1 10.298 - POU3231 -8.353945 -0.013474 8.433 1802.9120 210.3 22.108 16316+2307 - -1.151351 0.097761 277.85 2003.4700 210.2 22.199 - POU3246 1.025265 0.007408 1.041 1621.9200 166.4 16.528 16489+2259 - -0.181470 0.041853 79.96 2003.3300 166.4 16.570 10417 SHJ 243BD -179.122208 0.545681 192.190 1848.6230 342.9 309.786 17153-2636 - -69.658478 -1.403182 291.25 1987.6520 343.1 310.968 12913 STF2580AC 86.616745 -0.022163 86.723 2158.6089 124.6 109.270 19464+3344 - -4.296807 -0.446765 87.16 2009.4850 124.4 108.998 - BUP 202AD -41.656883 0.400098 58.158 1898.0229 2.1 86.627 20041+1704 - -40.583622 -0.410679 314.25 2009.6331 2.3 87.053 - HZG 15AD -20.516668 0.416876 29.713 2047.6370 259.8 36.788 20111+1611 - 21.492411 0.397951 223.67 2008.7780 259.1 36.451 - POU4348AB 9.232443 -0.011024 9.241 1907.6270 162.8 27.480 20182+2319 - 0.402985 0.252557 92.50 2008.8820 163.0 27.718 14585 BU 1138CE -0.019011 -0.386340 0.051 1949.2830 248.1 25.300 21028+4551 - -0.047053 0.156096 338.00 1962.7600 248.1 25.716 15275 STF2822AC -17.962929 -0.275661 27.131 1815.8290 290.7 76.401 21441+2845 - 20.332838 -0.243531 221.46 1999.8600 290.8 76.745 15797 BU 377AC -3.864764 -0.210705 12.191 2156.9790 51.0 34.855 22159+5440 - -11.562686 0.070427 341.52 2006.8890 50.9 34.647 15797 BU 377AD 7.414804 -0.213434 22.305 2010.6930 160.2 22.306 22159+5440 - 21.036974 0.075228 160.58 2006.8890 160.8 22.306 16261 HJ 301AC 83.832207 -0.230352 92.418 1719.7350 5.3 183.781 22467+1210 - -38.899464 -0.496432 65.11 1924.9010 5.2 184.255 16633 BU 1220AD 0.086581 -0.353315 3.452 1697.6479 273.2 110.447 23159-0905 - -3.451173 -0.008864 1.44 2008.8330 273.2 110.801 - BUP 240AB -20.662453 -0.375194 27.708 1796.3800 305.3 123.447 23399+0538 - 18.460800 -0.419940 228.22 2008.8820 305.3 123.995 ========================================================================================== NEW LINEAR FITS (cont.) Author: CVETKOVIC, Z ADS Name X0 Xa rho_0 T0 2011 RA 2000 DEC - Y0 Ya theta_0 Last ob. 2012 ---------------------------------------------------------------------------------------- 48 STT 547AD -14.463919 -0.871063 83.311 1936.073 228.5 106.46 00057+4549 - 82.046331 -0.153559 190.00 2011.6356 228.9 107.01 48 POP 217AP 1.726719 -0.888654 9.562 2002.921 333.0 12.03 00057+4549 - -9.405213 -0.163150 10.40 2011.6356 329.8 12.60 ========================================================================================== ANNOUNCEMENTS * Preliminary planning is underway for a possible IAU Symposium in September/October 2013 focusing on resolved spectroscopic binaries which would be jointly sponsored by Commissions 26, 30 and 54 hosted at the Special Astrophysical Observatory. For those interested in logistical details please see http://agora.guru.ru/display.php?conf=lot&l=1 for an example of a Fall 2011 meeting. At this time we are polling possible interest in this meeting. Please reply with a "would attend", "may attend" or "would not attend" to wds@usno.navy.mil. Thanks! Brian Mason Dimitri Pourbaix Gerard van Belle * The Proceedings of the "International Workshop on Double and Multiple Stars: Dynamics, Physics, and Instrumentation", held in Santiago de Compostela on December 10 and 11, 2009, are now available at the following reference: "2011/ AIP CONFERENCE PROCEEDINGS - 1346" Editors: J. A. Docobo, V. S. Tamazian, and Y. Y. Balega J. A. Docobo ****************************************************************************************** The deadline for contributions to Information Circular No. 176 is: February 15th 2012 J. A. Docobo (joseangel.docobo@usc.es) J. F. Ling (josefinaf.ling@usc.es) Tel: +34 981592747 Fax: +34 981597054 Observatorio Astronomico "R. M. Aller" P. O. Box 197 Universidade de Santiago de Compostela SPAIN ISSN: 1024-7769

INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS) INFORMATION CIRCULAR No. 176 (FEBRUARY 2012) NEW ORBITS ADS Name P (yr) T e W(2000) 2012 Author RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2013 ---------------------------------------------------------------------------------------- - HDS 314 82.18 2026.35 0.283 87.6 266.4 0.357 LING 02249+3039 4.3806 0.378 109.7 278.8 2010.0100 264.8 0.345 - HEI 449 28.25 2001.42 0.793 57.5 60.0 0.265 ZIRM 03213+1038 12.7433 0.155 117.5 185.8 2010.0048 58.9 0.271 & RICA - I 1489 32.79 1997.79 0.181 83.1 130.4 0.044 DOCOBO 04395-4507 10.979 0.270 84.1 281.6 2010.966 195.4 0.035 & CAMPO 6547 A 1581 549.21 1887.92 0.793 141.7 298.6 1.455 RICA 08031-0625 0.6555 1.510 69.6 331.2 2011.2498 298.7 1.466 & ZIRM 7457 A 1765 28.06 1994.86 0.408 131.5 7.5 0.128 DOCOBO 09379+4554 12.830 0.179 117.2 268.3 2001.028 357.7 0.137 & CAMPO - FIN 367Aa,Bb 87.00 2031.59 0.079 75.2 294.5 0.133 DOCOBO 12064-6543 4.1379 0.164 131.7 219.2 2011.037 290.4 0.136 & ANDRADE - FIN 65AB 200.0 1952.75 0.518 48.7 88.0 0.282 DOCOBO 12446-5717 1.8000 0.404 111.3 143.7 2010.069 86.8 0.289 & ANDRADE 8799 HU 572 102.90 1986.22 0.516 153.7 339.9 0.491 RICA 13091+2127 3.4986 0.400 145.0 30.9 2011.2502 338.3 0.501 & ZIRM 9043 HU 898 128.25 1984.63 0.783 33.0 296.2 0.342 DOCOBO 13539-1910 2.807 0.323 38.7 108.9 2011.037 297.4 0.348 & CAMPO - KUI 65 135.92 2014.56 0.867 105.0 159.4 0.063 ZIRM 13472-0943 2.6487 0.281 132.8 37.2 2008.5395 138.1 0.053 & RICA 10391 HU 1178AB 761.80 1955.56 0.627 13.5 9.3 0.353 ZIRM 17116+3916 0.4726 0.931 93.0 318.0 2010.4750 9.1 0.349 & RICA 11170 BU 1091 1460.0 1930.10 0.884 140.5 320.2 0.748 SCARDIA 18126+3836 0.2466 1.150 133.4 41.7 2011.742 320.0 0.754 et al. (*) 11454 HU 322AB 42.40 1966.93 0.615 90.3 122.7 0.025 RICA 18338+1744 8.4912 0.145 99.1 197.4 2009.2607 105.9 0.053 & ZIRM - FIN 328 27.85 2002.46 0.410 171.1 141.4 0.343 DOCOBO 21044-1951 12.9264 0.265 162.6 238.2 2010.586 134.9 0.352 & ANDRADE - COU 227 198.66 2031.70 0.299 126.3 114.8 0.519 RICA 21115+2144 1.8122 0.669 52.9 44.5 2010.5794 116.6 0.518 & ZIRM 14749 MCA 67Aa,Ab 56.93 2001.45 0.792 141.8 105.1 0.059 ZIRM 21118+5959 6.3236 0.066 120.5 262.8 2005.8654 102.7 0.060 & RICA - COU2138 45.44 2001.37 0.028 5.1 144.3 0.149 DOCOBO 21593+4606 7.9225 0.238 117.7 154.3 2007.8225 133.7 0.133 & LING - COU 234 300. 1 987.56 0.693 133.9 184.8 0.190 DOCOBO 22307+1759 1.2000 0.513 115.3 176.2 2007.5991 182.3 0.200 & LING 16314 HO 482AB 383.0 1925.18 0.608 166.1 17.1 0.532 SCARDIA 22514+2623 0.9399 0.555 121.9 347.2 2011.907 16.7 0.537 et al. (*) 16672 MCA 74Aa,Ab 6.314 1980.73 0.191 162.6 344.6 0.154 DOCOBO & 23191-1328 57.0162 0.187 45.8 208.3 2009.671 65.5 0.114 TAMAZIAN 16886 A 1493 134.0 2037.28 0.064 114.5 300.2 0.140 DOCOBO 23382+5514 2.6866 0.143 152.7 248.5 2007.5885 297.7 0.140 & LING (*) SCARDIA, PRIEUR, PANSECCHI & ARGYLE ========================================================================================== NEW LINEAR FITS Authors: FRIEDMAN, E.A., MASON, B.D. & HARTKOPF, W.I. ADS Name X0 Xa rho_0 T0 2012 RA 2000 DEC - Y0 Ya theta_0 Last ob. 2013 ---------------------------------------------------------------------------------------- 9 HJ 998AC 6.593071 -0.072446 8.766 1612.5780 330.1 44.879 00028+0208 - -5.777731 -0.082670 48.77 2000.6000 330.1 44.772 48 STT 547AC -5.695269 -0.868296 33.720 1891.2791 262.1 111.569 00057+4549 - 33.235783 -0.148791 189.72 2010.6844 262.3 112.409 101 HDO 2 11.080887 0.012322 11.324 1744.0040 132.9 19.632 00088+0801 - -2.331782 0.058556 78.12 2000.7300 133.0 19.680 - HJ 3364 -1.836430 -0.216291 23.852 1806.5090 246.2 50.559 00247-5359 - 23.781565 -0.016702 184.426 1999.7800 246.4 50.750 451 BU 1310AC -3.977083 -0.137718 11.817 1836.8790 275.1 28.207 00327+2312 - -11.127229 0.0492236 340.336 2007.6880 275.0 28.339 - COO 6 -0.049581 0.142336 0.239 1855.4399 677.4 22.780 01073-3452 - -0.233957 -0.030164 348.03 1999.99006 77.4 22.926 2610 HJ 334 -1.456584 0.020232 2.255 1377.8900 137.9 16.954 03339+3205 - 1.721853 0.017115 220.23 1998.0601 137.8 16.981 2701 HJ 336 -20.573658 -0.012725 20.770 1585.2510 324.5 44.740 03425+3256 - 2.846138 -0.091982 262.12 1999.3000 324.5 44.823 - HJ 678AB -2.771823 -0.113739 11.791 1872.6830 292.3 20.120 04268+0843 - -11.460090 0.027510 346.40 2007.1260 292.1 20.215 - HJ 3845 22.406897 -0.122976 24.787 1818.5740 358.7 60.901 06171-2243 - -10.599377 -0.259970 64.68 1959.2200 358.6 61.163 4927 STF 878AB -11.190924 0.002449 11.193 1747.1200 343.0 36.057 06215+6224 - -0.211817 -0.129376 271.08 1999.0200 343.1 36.180 6335 H 6 42AC -3.826545 0.643041 35.768 1615.0950 75.9 259.179 07453+2802 - -35.562344 -0.069192 353.86 1987.0400 76.0 259.820 - HJ 3308AB -22.205055 -0.249003 33.005 1813.1360 286.0 74.626 08102+3527 - 24.418877 -0.226429 222.28 1998.1899 286.2 74.928 - HJ 96AC -7.634680 0.112713 12.364 1499.3430 137.7 74.494 08324-0056 - 9.725451 0.088482 218.13 2004.2159 137.6 74.636 7198 STF1316BC -2.247722 -0.080329 3.539 1884.8370 294.4 13.691 09079-0708 - 2.732999 -0.066065 219.44 2010.2650 294.6 13.792 8100 STT 539BC -0.585939 -0.380061 1.842 1835.3480 287.0 70.843 11152+7329 - 1.745930 -0.127550 198.55 2003.3700 287.1 71.243 8440 STF1604BC 2.123110 -0.291981 7.283 1981.3160 324.9 11.873 12095-1151 - -6.966699 -0.088981 16.95 2010.3470 324.1 12.116 - HJ 4528 -4.547540 0.074703 17.150 1693.5050 140.1 30.051 12342-3206 - 16.536470 0.020543 195.38 2004.3600 140.1 30.114 - HJ 4530A,BC 0.636136 0.383550 4.546 1857.6990 86.3 59.943 12350-4717 - 4.501637 -0.054200 171.96 1966.4500 86.3 60.329 - HJ 230 -34.512737 -0.008281 34.791 1184.9960 320.1 64.487 13422+1807 - 4.388125 -0.065131 262.75 2002.2980 320.1 64.542 - HJ 2688 -13.628181 -0.041207 16.476 1673.6880 292.2 29.779 13510+2346 - 9.259405 -0.060650 235.81 2007.2000 292.3 29.841 9281 HJ 2725AB,C -3.373027 0.048027 12.721 1522.5870 132.9 27.497 14288+5430 - 12.265869 0.013207 195.38 2000.1000 132.9 27.542 - STT 584AB -96.594749 -0.360605 100.323 1777.5840 326.6 328.682 15565+1540 - 27.094456 -1.285598 254.33 2000.3199 326.6 329.954 - HJ 1290 11.080775 0.019349 12.536 1641.9730 112.8 19.787 16152-0046 - -5.862827 0.036570 62.12 2008.3979 112.9 19.819 - WNO 5 - 3.086665 -0.145428 4.728 1870.6440 300.9 27.547 17054-3346 - 3.581273 -0.1253436 220.76 1998.5200 300.9 27.737 - WFC 186 2.582238 0.009483 2.603 1769.9380 15.3 18.520 17061+4329 - 0.325838 -0.075156 97.19 2008.7321 15.2 18.595 - HJ 4917 -1.594242 0.083490 11.937 1898.4980 31.0 15.296 17097-5420 - -11.829822 -0.011252 352.326 2000.3800 31.3 15.348 - DUN 214AB -13.055362 0.144872 27.965 1849.2150 15.8 38.642 17133-6712 - -24.730068 -0.076480 332.17 2007.3730 16.0 38.756 - HO 413 -4.668693 -0.051410 5.444 1838.0990 311.7 18.212 17224-3012 - 2.800621 -0.085701 239.04 1998.6100 311.7 18.308 10778 AG 356 3.019531 -0.063086 6.317 1830.1790 215.6 14.507 17462+1019 - 5.548050 0.034334 151.44 2004.4130 215.8 14.571 10903 HO 72BC 5.127814 0.018452 5.146 1901.3000 163.3 24.950 17559+3326 - -0.430571 0.219755 85.20 2003.4810 163.4 25.165 - DUN 219 -33.259064 -0.036054 37.953 1498.6210 253.5 54.007 17589-3652 - -18.283575 0.065585 298.80 1999.6100 253.4 54.060 11431 HU 321AB -2.845246 0.078033 3.294 1883.8220 20.9 20.113 18317+2310 - -1.660777 -0.133686 300.27 2000.3900 20.9 20.265 11510 H 5 39AB 34.471737 -0.196474 41.857 1810.3719 183.6 81.421 18369+3846 - 23.743351 0.285250 124.56 2010.4250 183.8 81.719 11632 STF2398BC -38.835636 1.380131 48.391 1915.0830 155.6 229.368 18428+5938 - 28.869774 1.856553 233.37 2000.29006 155.4 231.629 - HJ 1349 6.113636 0.068556 13.064 1663.6550 92.1 30.015 18488+3319 - -11.544742 0.036304 27.90 2008.4260 92.2 30.085 12061 STF2461AC 31.750431 1.105189 45.007 1829.0160 54.1 288.862 19074+3230 - 31.899099 -1.100038 135.13 1983.7800 54.1 290.402 12061 STF2461CE 67.730011 -1.221359 100.277 1866.1331 205.0 261.582 19074+3230 - 73.946144 1.118688 137.51 1983.8199 205.1 263.112 13149 HJ 1455AD 24.066206 0.035809 46.808 2286.1819 162.8 48.187 19563+3505 - 40.147305 -0.021466 149.06 2007.7980 162.8 48.178 13560 STF2658BC -15.515335 -0.065916 16.101 1732.0270 208.6 70.887 20136+5307 - -4.304286 0.237602 285.51 2000.3700 208.6 71.128 14073 STF2704AB,D 5.117892 -0.122294 28.757 1710.9050 317.8 47.193 20375+1436 - -28.297535 -0.022118 10.25 2009.7400 317.7 47.292 14274 STT 594AB -26.498772 -0.349936 38.314 1882.7510 257.7 73.415 20462+3358 - -27.672396 0.335094 316.24 2007.8680 257.5 73.829 16140 HJ 1796 17.012409 -0.038850 26.780 1662.5050 6.1 32.035 22386+5648 - -20.681864 -0.031957 39.44 2004.8850 6.1 32.063 - HJ 972 2.479737 -0.074473 23.453 1794.2371 208.7 28.567 22530+3140 - 23.321299 0.007919 173.93 2008.5081 208.9 28.609 ========================================================================================== NEW WIDE COMMON PROPER MOTION COMPANIONS TO EXOPLANET HOST STARS In a new project to search for wide new physical companions to exoplanet hosts, Francisco Rica has found new wide common proper motion companions to several exoplanet host stars. Astrometric measures (using online photographic surveys and CCD cameras), astrophysical characterization for the stellar components and a dynamical study of this new stellar system will be performed. The astromechanics will be used to determine if the stellar components for these new system could be gravitationally bound. The Table 1 lists same basic astrophysical data and Table 2 lists astrometrics measures: Table 1. Astrophysical data Name Star V mag. SpT Distance PM-AR PM-DEC (pc) (mas/yr) (mas/yr) ----------------------------------------------------------------------------- HD 134606 6.86 G5-6 IV 26.5 -178 -165 2MASS J15152170-7031572 12.7 M3V -- -181 -166 HD 158038 7.47 K1III 103.6 + 45 - 58 2MASS J17254334+2718382 15.00 M3V -- + 50 - 58 HD 215456 6.63 G3IV-V 38.0 +208 - 49 2MASS J22460336-4858224 14.1 M2.5V 39. +214 - 50 Table 2. Astrometric measures Binary Epoch theta rho Aperture Method (deg) (arcsec) ------------------------------------------------------------ 1 1976.238 144.12 56.55 48 DSS 1980.392 144.42 57.52 48 DSS 1987.392 144.76 56.97 48 DSS 1992.57 144.80 57.23 48 DSS 1993.54 144.27 57.65 48 DSS 1999.142 144.70 57.33 48 DSS 2000.2199 144.52 57.36 51 2MASS 2000.237 145.19 57.43 48 DSS 2 2000.231 313.18 38.32 51 2MASS 3 1999.721 294.80 50.76 51 2MASS ========================================================================================== PAPERS PUBLISHED IN 2011 1. ABT, H. A.: The Age of the Local Interstellar Bubble. Astron. J. 141, 165 (2011). 2. ANDRADE, M. & DOCOBO, J. A.: On the dynamical stability of the very low-mass object Gliese 22 Bb. Icarus 215, 712 (2011). 3. BALEGA, Y. Y. et al: Speckle interferometry of magnetic Ap/Bp stars at the BTA 6-m telescope (new binary and multiple systems. Astron. Nach. 332, 978 (2011). 4. BARTLETT, J. L., MASON, B. D. & HARTKOPF, W. I.: The USNO 26" Clark Refractor: From Visual Observations to Speckle Interferometry. Bull. Amer. Astron. Soc. 43, #217, 146.06 (2011). 5. BERGER, J.-P. et al: First astronomical unit scale image of the GW Orionis triple system - Direct detection of a new stellar companion . Astron. Astroph. 529, L1 (2011) 6. BILLER, B. et al. : A Keck LGS AO Search for Brown Dwarf and Planetary Mass Companions to Upper Scorpius Brown Dwarfs. Astrophys. J. 730, 39 (2011). 7. BONNEAU, D. et al.: A large Halpha line forming region for the massive interacting binaries beta Lyrae and mu Sagitarii . Astron. Astroph. 532, A148 (2011) 8. BORKOVITS, T. et al.: Transit timing variations in eccentric hierarchical triple exoplanetary systems. I. Perturbations on the time scale of the orbital period of the perturber. Astron. Astrophys. 528, 53 (2011). 9. TEN BRUMMELAAR, T. A. et al.: An Interferometric and Spectroscopic Analysis of the Multiple Star System HD 193322. Astron. J. 142, 21 (2011). 10. BUCHHAVE, L. A. et al.: Kepler-14b: A Massive Hot Jupiter Transiting an F Star in a Close Visual Binary. Astron. J. 141 180 (2011). 11. CVETKOVIC, Z.: Four First and Two Recalculated Orbits for Binaries. Astron. J. 141 116 (2011). 12. CVETKOVIC, Z. et al.: CCD Measurements of Double and Multiple Stars at NAO Rozhen: Orbits and Linear Fits of Five Pairs. Astron. J. 142 73 (2011). 13. DHITAL, S. et al.: Resolved Spectroscopy of M Dwarf/L Dwarf Binaries. IV. Discovery of AN M9 + L6 Binary Separated by Over 100 AU . Astron. J. 141, 7 (2011). 14. DUCATI, J. R., PENTEADO, E. M. & TURCATI, R.: The mass ratio and initial mass functions in spectroscopic binaries. Astron. Astroph. 525, A26 (2011). 15. DUPUY, T. J. & LIU, M. C. : On the Distribution of Orbital Eccentricities for Very Low-mass Binaries. Astrophys. J. 733, 122 (2011). 16. ERIS, F. Z. & EKMEKC, I, F.: A 2007 photometric study and UV spectral analysis of the Wolf-Rayet binary V444 Cyg. Astron. Nach. 332, 616 (2011) 17. EVANS, N. R. et al.: The Orbit of the Cepheid V350 Sgr Revisited. Astron. J. 142, 87 (2011). 18. FAHERTY, J. K. et al.: Identification of a wide, low-mass multiple system containing the brown dwarf 2 mass J0850359+105716. Astron. J. 141, 71 (2011). 19. FEKEL, F. C.; WILLIAMSON, M. H. & HENRY, G. W.: New Precision Orbits of Bright Double- lined Spectroscopic Binaries. VI. HD 24623 and V923 Scorpii. Astron. J. 141, 145 (2011). 20. FEKEL, F. C. et al.: New Precision Orbits of Bright Double-lined Spectroscopic Binaries. VII. 47 Andromedae, 38 Cassiopeiae, and HR 8467. Astron. J. 142, 69 (2011). 21. GEIER, S. et al.: Binaries discovered by the SPY survey - VI. Discovery of a low mass companion to the hot subluminous planetary nebula central star EGB 5 a recently ejected common envelope? Astron. Astroph. 528, L16 (2011) 22. GRIFFIN, R. F.: Spectroscopic binary orbits from photoelectric radial velocities Paper 216: HD 144286, HD 149559, HD 152109 and BD +23 3009. The Observatory 131, 17 (2011). 23. GRIFFIN, R. F.: Spectroscopic binary orbits from photoelectric radial velocities Paper 217: HD 159220, HD 211922, HD 212859, and HD 219726. The Observatory 131, 70 (2011). 24. GRIFFIN, R. F.: Spectroscopic binary orbits from photoelectric radial velocities Paper 218: HD 115461, HD 116247, HD 116345, and HD 120006. The Observatory 131, 139 (2011). 25. GUINAN, E. F. et al.: MOST Ultra-high Precision Photometry of delta Capricorni - the Nearest & Brightest Eclipsing Binary with a Pulsating Component: An Important Asteroseismic Laboratory for A-type Stars. Bull. Amer. Astron. Soc. 43, #218, 407.16 (2011). 26. HARTKOPF, W. I. & MASON, B. D,: Speckle Interferometry at the USNO Flagstaff Station: Observations Obtained in 2008 and Nine New Orbits. Astron. J. 142, 56 (2011). 27. HELMINIAK, K. et al.: Dynamical Evidence For A Sub-stellar Companion To By Draconis. Amer. Astron. Soc. ESS Meeting, #2, 32.02 (2011). 28. HINKLEY, S. et al. : Establishing ff Oph as a Prototype Rotator: Improved Astrometric Orbit. Astrophys. J. 726, 104 (2011). 29. HORCH, E. P. et al.: Observations of Binary Stars with the Differential Speckle Survey Instrument. II. Hipparcos Stars Observed in 2010 January and June. Astron. J. 141 45 (2011). 30. HORCH, E. P. et al.: Observations of Binary Stars with the Differential Speckle Survey Instrument. III. Measures below the Diffraction Limit of the WIYN Telescope. Astron. J. 141 180 (2011). 31. HOWELL, S. B. et al.: Speckle Camera Observations for the NASA Kepler Mission Follow- up Program. Astron. J. 142, 19 (2011). 32. K"OHLER, R.: The orbit of GG Tauri A. Astron. Astroph. 530, A126 (2011) 33. K"OSE, O. et al.: The short-period low-mass binary system CC Com revisited. Astron. Nach. 332, 626 (2011) 34. KROUPA, P. & PETR-GOTZENS, M. G.: The initial period function of late-type binary stars and its variation . Astron. Astroph. 529, A92 (2011) 35. LIAKOS, A. et al: Photometry and spectroscopy of the newly discovered eclipsing binary GSC 4589-2999. Astron. Nach. 332, 602 (2011) 36. MAHY, L. et al.: The two components of the evolved massive binary LZ Cephei. Testing the effects of binarity on stellar evolution . Astron. Astroph. 533, A9 (2011) 37. MARTYNOVA, A. I. & ORLOV, V. V.: Resonances in the three-body problem with equal masses. Astron. Reports 55, (2) 174 (2011). 38. MASON, B. D. & HARTKOPF, W. I. : The U.S. Naval Observatory Double Star Program: Frequently Asked Questions. Journal Double Star Obs. 7, 62 (2011). 39. MASON, B. D, HARTKOPF, W. I. & WYCOFF, G. L.: Speckle Interferometry at the U.S. Naval Observatory. XVI. Astron. J. 141, 157 (2011). 40. MASON, B. D, HARTKOPF, W. I. & WYCOFF, G. L.: Speckle Interferometry at the U.S. Naval Observatory. XVII. Astron. J. 142, 46 (2011). 41. MASON, B. D. et al.: Know the Star, Know the Planet. II. Speckle Interferometry of Exoplanet Host Stars. Astron. J. 142, 176 (2011). 42. MEILLAND, A. et al.: The binary Be star ffi Scorpii at high spectral and spatial resolution. I. Disk geometry and kinematics before the 2011 periastron. Astron. Astroph. 532, A80 (2011) 43. MELIKIAN, N. D., TAMAZIAN, V. S. & SAMSONYAN, A. L: Variation in the flare activity of the star UV Ceti. Astroph. 54 (4), 469 (2011). 44. MONNIER, J. D. et al. : First Visual Orbit for the Prototypical Colliding-wind Binary WR 140. Astrophys. J. 742 L, 1 (2011). 45. MORAIS, M. H. M. & CORREIA, A. C. M.: Stellar wobble caused by a nearby binary system: eccentric and inclined orbits . Astron. Astroph. 525, A152 (2011). 46. MORENO, E., KOENIGSBERGER, G. & HARRINGTON, D. M.: Eccentric binaries - Tidal flows and periastron events. Astron. Astroph. 528, A48 (2011) 47. MUTERSPAUGH, M. W. et al.: The Planet in the HR 7162 Binary System Discovered by PHASES Astrometry. Bull. Amer. Astron. Soc. 43, #217, 429.09 (2011). 48. O'BRIEN, D. P. et al. : Inner Orbits in Hierarchical Triple Systems from the CHARA Array. I. V819 Her B. Astrophys. J. 728, 111 (2011). 49. ORLOV, V. G. et al.: Speckle Interferometry at the Observatorio Astron'omico Nacional. III Rev. Mex. A. A. 47, 211 (2011). 50. RADIGAN, J. et al. : Discovery of the First Resolved Triple T-Dwarf. Bull. Amer. Astron. Soc. 43, #217, 226.01 (2011). 51. RATAJCZAK, M. et al.: A Keck I/HIRES and TNG/SARG Radial Velocity Survey of Speckle Binary Stars. Amer. Astron. Soc. ESS Meeting, #2, 20.03 (2011). 52. RICHARDSON, N. D.; GIES, D. R. & WILLIAMS, S. J.: A Binary Orbit for the Massive, Evolved Star HDE 326823, a WR+O System Progenitor. Astron. J. 142, 201 (2011). 53. ROBERTS. L.C. Jr. et al.: Know the Star, Know the Planet. I. Adaptive Optics of Exoplanet Host Stars. Astron. J. 142, 175 (2011). 54. ROSERO, V. et al.: Orbital Solutions for Two Young, Low-mass Spectroscopic Binaries in Ophiuchus. Astron. J. 141, 13 (2011). 55. SCARDIA, R. et al: Speckle observations with PISCO in Merate: X. Astrometric measurements of visual binaries in 2009. Astron. Nach. 332, 508 (2011). 56. SIM'ON-D'IAZ, S.; CABALLERO, J. A. & LORENZO, J. : A Third Massive Star Component in the sigma Orionis AB System. Astrophys. J. 742, 55 (2011). 57. STUMPF, M. B. et al.: Resolving the L/T transition binary SDSS J2052-1609 AB. Astron. Astroph. 525, A123 (2011). 58. TOKOVININ, A.: Low-mass visual companions to nearby G-dwarfs. Astron. J. 141, 52 (2011). 59. TORRES, K. B. V. et al.: Spectra disentangling applied to the Hyades binary theta 2 Tauri AB: new orbit, orbital parallax and component properties. Astron. Astroph. 525, A50 (2011). 60. WEBER, M. & STRASSMEIER, K. G.: The spectroscopic orbit of Capella revisited. Astron. Astroph. 531, A89 (2011). ========================================================================================== IRVING W. LINDENBLAD (1929-2011) Irving Werner Lindenblad, graduate of Wesleyan University (Middletown, CT), Astronomer at the U.S. Naval Observatory, 1957-1989, died 11 November 2011. He was 82. His first work at the USNO was working in and later in charge of the Solar Program making sunspot counts and determining their positions. In the mid 1960s he left this project and began what was probably his most important work at the USNO, his careful observation of the Sirius binary star system. The large magnitude difference (dV = 9.96) and close angular separation (3".06 < sep < 11".94) of these stars have presented an observational challenge ever since the companion's existence was ascertained from periodic proper motion errors noted by Freiedrich Bessel in 1844. Lindenblad utilized several techniques to obtain very accurate and precise relative measurements of Sirius A and B (AJ 75, 841; 1970 & AJ 78, 226; 1973). The first was the Hertzsprung photographic method, already well-established at the US Naval Observatory in which he was an active participant (PUSNO 18, Pt. 7; 1969). Ejnar Hertzsprung developed this multiple exposure technique for observing double stars photographically around 1914 at Potsdam. The technique involved taking one or more rows of 17 to 35 exposures of a small field which normally includes only the double star itself. An important feature of the technique is the use of coarse objective gratings to substantially reduce the magnitude error by providing two symmetrically placed grating images of the primary star of approximately the same size as the image of the secondary. However, the large magnitude difference of Sirius presented special challenges. Lindenblad also utilized a hexagonal diaphragm which produced a point spread function with a six-cusped image rather than the usual Airy diffraction pattern of circular apertures. Rotation of the diaphragm allowed the companion to be placed between the "spikes" for the companion to be observed. Rather than the coarse grating of the Hertzprung method, Lindenblad used many evenly spaced extremely fine wires to produce good first-order images. These were affixed in a steel frame of mounting bars so that thermal expansion of the duraluminum hexagon was not transferred to the wires. Finally, measures were made of higher order images to measure and take into account the Ross effect, an emulsion contraction consideration. Making the observations of Sirius AB with all of these innovative techniques, the observations taken as part of this program remain the most precise ground-based measures of Sirius A and B obtained. This work led to the best current V band estimate of the brightness of Sirius B as well as (AJ 78, 205; 1973) ruling out possible higher order proper motion perturbations and periodicities (i.e., the "Dogon" companion) or (A&A 41, 111; 1975) investigating the "red" Sirius controversy. In the mid 1970s, after the Sirius project, Lindenblad worked in the field of Earth Orientation. He made particular study of the geophysical effects of the rotation of the Earth and modeled polar motion and was in charge of the 65 cm Photographic Zenith Tube in Washington. He became interested in possible tidal effects on polar motion and the correspondence between lunar phase and seismic events such as earthquakes and volcanoes. He predicted when Mt. Saint Helens would blow and told Dennis McCarthy on the Friday (16 May 1980) before the event (18 May) that if it was going to erupt, it would be that weekend because of the phase of the Moon. Recently, a cache of unreduced photographic plates of Sirius taken with Lindenblad's methodology were uncovered, which yielded a total of 166 good observations of Sirius A and B obtained on 68 nights from 1970 to 1984. There is an excellent chance we may be able to improve upon the current "best" orbit of Sirius, that of van den Bos from 1960. The greatest challenge faced in this task is replicating the accuracy and precision of this excellent and careful researcher. What is clear at this point is that the results of his innovative data acquisition methodology will continue to be felt for many years to come. Also see : http : //www.washingtonpost.com/local/obituaries/irving-w-lindenblad- astronomer - minister/2011/12/13/gIQAuGLP sO story.html B. D. Mason ========================================================================================== JESUS M. COSTA (1926-2012) It is with sincere sadness that I inform you of the death of our colleague, Jesus-Manuel Costa (retired in 1991). Costa was a disciple of R. M. Aller and, as a member of the Spanish C.S.I.C., he played an important role in the defense of our Observatory after the death of its founder in 1966 until a new Scientific Director was named in 1983. His contribution to double star research is reflected in his micrometer measurements (CSA code) and in the orbits published in the journal, Urania, as well as in the Information Circulars of our Commission between 1978 and 1991. Rest in peace! J. A. Docobo Director R. M. Aller Astronomical Observatory ========================================================================================== INFORMATIVE NOTES * COMMISSION 26 ELECTIONS The election process in our Commission is open. We need to elect the new Vice-President and three members of the Organizing Committee. The general information about this subject is available at these addresses: http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/dsl http://www.usc.es/astro/com26 elections.doc Please, note that the deadline to present nominations is March 26th. Jose-Angel Docobo C26 President * A workshop will be organized next June in order to define the needs in a new reduction of old observations mainly astrometric photographic plates in the scope of the arrival of the Gaia catalogue and mainly for moving objects such as solar system bodies. The creation of an international working group could be made during this workshop. I thank you in advance and I would be glad to receiving your comments. Information on this workshop at: http://www.imcce.fr/hosted_sites/naroo/ Jean-Eudes Arlot IMCCE/Paris observatory/CNRS * 2014 Meeting of Commissions 26, 30 and 54? The potential meeting for 2013 in the Caucusus will not be held due to a insufficient positive response from members of the three relevant commissions. We are now focusing on venues that are generally more accessible for a 2014 date. Possibilities at present are: Brussels, Belgium summer Flagstaff, AZ, USA summer Washington, DC, USA spring There has also been interest in Commission 42 for the meeting and it is possible that the sponsoring commissions lists will grow. Please let me or one of the other Commission VPs (30 Dimitri Pourbaix and 54 Gerard van Belle) know if you are interested and if you have any venue preferences. Brian Mason ****************************************************************************************** The deadline for contributions to Information Circular No. 177 is: June 15th 2012 J. A. Docobo (joseangel.docobo@usc.es) J. F. Ling (josefinaf.ling@usc.es) Tel: +34 981592747 Fax: +34 981597054 Observatorio Astronomico "R. M. Aller" P. O. Box 197 Universidade de Santiago de Compostela SPAIN ISSN: 1024-7769

INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS) INFORMATION CIRCULAR No. 177 (JUNE 2012) NEW ORBITS ADS Name P (yr) T e W(2000) 2012 Author RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2013 ---------------------------------------------------------------------------------------- - COU 247 159.51 2005.80 0.309 21.1 241.4 0.330 DOCOBO 00095+1907 2.2569 0.543 137.0 103.4 2010.635 237.3 0.341 & CAMPO - HDS 23Da,Db 31.41 2006.28 0.856 93.7 336.8 0.128 CVETKOVIC 00101+3825 11.4620 0.131 134.8 311.2 2004.8237 332.9 0.141 - HDS 33 22.450 2012.355 0.627 157.5 180.3 0.080 CVETKOVIC 00143-2732 16.03530 0.252 61.9 72.4 2011.0366 302.9 0.075 674 A 921AB 120.47 1982.40 0.696 140.3 14.9 0.177 CVETKOVIC 00492+5720 2.9882 0.221 59.6 96.6 2007.7987 16.6 0.177 - FIN 312 2.6532 2012.3092 0.229 100.1 68.9 0.088 DOCOBO & 02396-1152 135.6852 0.105 24.7 30.0 2009.754 251.1 0.109 ANDRADE 2375 BU 1030AB 571. 2156. 0.084 97.4 103.2 0.800 ZIRM 03101+2145 0.6301 0.802 123.7 90.3 2007.999 102.8 0.800 & RICA 2377 STT 50AB 309. 2087. 0.400 14.3 147.8 0.942 SCARDIA 03127+7133 1.1650 1.020 135.9 5.6 2009.081 146.8 0.932 et al. (*) 2639 A 830 219.0 2066.2 0.31 18.0 348.3 0.290 ZIRM 03365+1011 1.6438 0.325 125.7 167.1 2003.9519 347.2 0.285 & RICA - RST2324 85.71 1995.14 0.606 17.6 209.3 0.279 CVETKOVIC 03494-1956 4.2001 0.245 143.0 27.6 2011.0394 207.3 0.288 3116 A 1939 544. 2201.5 0.0 75.8 297.6 0.678 ZIRM 04187+0445 0.6610 0.876 50.8 0.0 2003.9520 298.3 0.674 & RICA - FIN 320 43.25 2006.38 0.865 19.6 135.5 0.092 DOCOBO & 04515-3454 8.3237 0.256 107.5 108.9 2010.966 126.2 0.096 ANDRADE - FIN 343 68.69 2019.94 0.494 44.8 268.3 0.097 DOCOBO & 06253+0130 5.2409 0.133 144.6 228.9 2011.037 261.1 0.093 ANDRADE 5280 STT 150 231.9 1982.2 0.731 17.5 12.9 0.271 DOCOBO 06393+4200 1.5524 0.301 100.8 247.7 2008.115 12.6 0.274 & LING - FIN 334Aa,Ab 475. 2014. 0.603 153.2 335.5 0.109 DOCOBO & 07003-2207 0.7579 0.275 107.3 178.9 2010.969 334.3 0.109 ANDRADE 6459 A 2537 428. 2083. 0.0 3.6 37.9 0.208 ZIRM 07555+2422 0.8411 0.338 113.8 0.0 2004.2035 37.0 0.211 & RICA - FIN 315Aa,Ab 340. 1948. 0.748 114.7 202.2 0.102 DOCOBO & 08291-4756 1.0588 0.427 78.9 300.0 2012.102 204.6 0.103 ANDRADE - FIN 335 17.366 2014.467 0.557 98.5 204.7 0.106 DOCOBO & 08345-3236 20.7302 0.146 39.6 220.3 2011.935 234.9 0.089 ANDRADE - FIN 363AB 3.4398 2013.3248 0.453 160.4 194.6 0.115 DOCOBO & 09173-6841 104.6572 0.0917 139.1 120.1 2012.102 128.9 0.062 ANDRADE - FIN 326 18.266 2020.143 0.404 3.5 21.3 0.139 DOCOBO & 09442-2746 19.7088 0.110 123.6 141.2 2012.028 15.2 0.143 ANDRADE 7738 BU 25 817. 2295. 0.0 0.2 131.8 1.574 ZIRM 10217-0946 0.4405 1.837 141.2 0.0 2005.298 131.4 1.571 & RICA - FIN 367Aa,Ab 48.37 2001.27 0.800 176.0 116.2 0.130 DOCOBO & 12064-6543 7.4426 0.171 119.4 276.0 2011.037 112.5 0.133 ANDRADE 8764 BU 798 60.2 1980.3 0.431 170.9 174.4 0.418 ZIRM 13040-1738 5.9801 0.352 84.8 209.6 2009.2600 174.7 0.404 & RICA - FIN 305 18.915 2019.167 0.931 3.9 92.3 0.173 DOCOBO & 13117-2633 19.0325 0.104 153.7 87.1 2009.26 89.9 0.166 ANDRADE - FIN 369 24.786 1996.930 0.473 16.6 314.0 0.071 DOCOBO & 13320-6519 14.5243 0.176 75.2 81.4 2012.184 331.1 0.084 ANDRADE 9126 HU 742 726. 1984. 0.643 118.9 345.2 0.279 RICA 14087+3341 0.4957 1.457 107.7 38.1 2011.3459 342.2 0.296 9182 STF1819 223.5 2008.1 0.200 3.0 174.1 0.892 SCARDIA 14153+0308 1.6107 1.119 146.8 181.1 2011.477 172.0 0.891 et al. (*) 9195 HU 1266 38.95 2025.55 0.644 176.6 147.4 0.249 DOCOBO 14165+3334 9.2426 0.167 26.0 131.9 2008.461 150.3 0.244 & CAMPO - FIN 318Aa,Ab 101.49 1977.47 0.674 172.1 128.3 0.182 DOCOBO & 14373-4608 3.5472 0.194 117.8 260.0 2011.303 126.9 0.181 ANDRADE 9872 A 1639AB 314. 1938. 0.0 5.1 87.9 0.236 ZIRM 16003+1140 1.1439 0.291 35.8 0.0 2009.2605 89.3 0.236 & RICA - FIN 384Aa,Ab 4.9630 2013.3710 0.559 108.5 252.3 0.059 DOCOBO & 16057-0617 72.5368 0.046 154.7 8.4 2009.263 184.1 0.028 ANDRADE - COU1281 46.46 2015.38 0.629 26.8 205.0 0.164 DOCOBO & 16229+3803 7.7486 0.255 76.2 269.0 2008.461 209.2 0.136 TAMAZIAN - COU 985 91.10 1986.55 0.327 81.3 254.7 0.336 DOCOBO 16384+3514 3.9517 0.298 59.0 34.3 2009.4415 256.2 0.344 & LING 10398 STT 325 2838. 2130. 0.662 6.2 290.6 0.349 RICA 17130+0745 0.1268 3.34 77.9 348.8 2010.5819 292.4 0.351 - BU 1119 1032. 2012. 0.612 45.3 228.4 0.351 ZIRM 17173-3010 0.3488 0.906 131.5 175.2 2008.5398 227.2 0.351 & RICA - FIN 373 59.32 2008.55 0.172 119.6 88.4 0.057 DOCOBO & 17221-7007 6.0688 0.115 69.4 270.5 2009.263 95.7 0.067 ANDRADE - CHR 64 200.90 1948.47 0.247 164.9 152.5 0.418 LING 17471+4737 1.7919 0.451 73.4 186.1 2009.4546 153.0 0.427 - FIN 381 9.008 2007.297 0.327 173.6 292.4 0.108 DOCOBO & 17542+1108 39.9645 0.0853 160.9 58.3 2008.461 269.0 0.102 ANDRADE 11170 BU 1091AB 1297. 1933. 0.896 172.9 319.9 0.736 ZIRM 18126+3836 0.2774 1.175 138.5 77.8 2010.500 319.7 0.741 & RICA - FIN 357 13.610 2016.470 0.372 169.8 54.6 0.170 DOCOBO & 19035-6845 26.4511 0.142 160.5 261.6 2008.772 37.1 0.156 ANDRADE 12057 A 262 108.2 1959.1 0.83 136.2 89.8 0.196 ZIRM 19073+2432 3.3272 0.143 50.4 122.0 2007.532 90.4 0.197 & RICA 12144 A 1391 141.0 1980.60 0.416 62.8 14.3 0.212 SCARDIA 19106+5429 2.5532 0.234 42.2 177.1 2007.602 16.4 0.218 et al. (*) 12515 A 1653 229.1 2039.9 0.073 65.8 143.2 0.198 SCARDIA 19296+1224 1.5714 0.211 171.5 332.4 2007.601 141.5 0.198 et al. (*) - CHR 87 47.16 2020.44 0.198 166.1 163.0 0.133 CVETKOVIC 19336+3846 7.6340 0.140 59.5 80.8 2010.4816 167.3 0.130 13611 A 2095AB 148.58 2049.90 0.758 101.6 154.5 0.273 LING 20157+4339 2.4226 0.345 94.5 101.6 2009.4390 154.3 0.275 14748 HO 152 219.1 2018.4 0.376 135.4 137.2 0.233 SCARDIA 21125+2821 1.6431 0.366 67.7 29.3 2010.635 138.6 0.227 et al. (*) - FIN 329 36.55 2003.61 0.041 79.9 215.0 0.101 DOCOBO & 21158-5316 9.8495 0.151 122.7 154.2 2009.755 201.9 0.091 ANDRADE - FIN 330AB 19.957 2006.000 0.256 29.1 36.0 0.138 DOCOBO & 21477-3054 18.0388 0.137 103.0 199.0 2010.586 32.6 0.157 ANDRADE - FIN 307 12.237 2007.518 0.032 90.8 275.6 0.170 DOCOBO & 21579-5500 29.4190 0.176 76.3 64.9 2009.668 285.2 0.127 ANDRADE - COU 537 47.43 1993.70 0.595 69.3 322.1 0.236 DOCOBO 22077+2622 7.5901 0.185 35.1 89.1 2008.710 325.1 0.238 & LING 16539 A 1238AB 71.99 1963.25 0.277 114.3 109.4 0.289 SCARDIA 23088+1058 5.0006 0.247 153.5 145.7 2008.887 106.2 0.285 et al. (*) 16886 A 1493 140.61 1924.24 0.037 106.8 303.2 0.150 DOCOBO 23382+5514 2.5597 0.148 152.5 299.9 2008.820 301.0 0.151 & LING (*) SCARDIA, PRIEUR, PANSECCHI & ARGYLE ========================================================================================== NEW LINEAR FITS Authors: RICA, F.M. & ZIRM, H. ADS Name X0 Xa rho_0 T0 2012 RA 2000 DEC - Y0 Ya theta_0 Last ob. 2013 ------------------------------------------------------------------------------- 124 BU 253Ba.Bb 0.06529 -0.00137 0.45 2151.477 31.5 0.493 00104+5831 - 0.44747 0.00020 8.3 2002.067 31.4 0.492 129 BU 485Ca.Cb -0.06589 0.00248 0.09 2012.907 229.1 0.090 00108+5846 - -0.06151 -0.00265 227.0 1994.7084 226.8 0.090 733 A 1259 0.10177 -0.00084 0.11 2007.804 120.2 0.114 00561+5406 - -0.04992 -0.00172 116.1 1995.9207 121.1 0.114 859 BU 1161 0.12272 0.00313 0.35 2014.624 18.9 0.353 01029+5148 - 0.33133 -0.00116 20.3 2003.9515 19.4 0.353 996 BU 1029BC 0.04272 0.02585 0.15 1925.095 77.6 2.344 01137+0735 - -0.14774 0.00748 163.9 2001.78 77.6 2.371 1533 BU 1367 0.71285 0.00164 0.73 1991.170 93.7 0.749 01556+0146 - 0.13364 -0.00877 79.4 2001.7970 94.4 0.751 4117 A 2646AB 0.07838 0.00180 0.17 1956.096 117.8 0.203 05310+0440 - -0.14789 0.00096 152.1 1993.0924 117.3 0.204 4136 A 2509 -0.04795 0.00457 0.07 1922.420 137.9 0.539 05323+0217 - -0.05719 -0.00383 220.0 1997.15 137.8 0.545 4301 A 2436 0.19145 -0.00262 0.23 1977.504 159.0 0.282 05435+1642 - -0.12266 -0.00408 122.7 2007.999 159.8 0.285 4360 A 3018 -0.43797 -0.00641 0.52 1940.304 297.0 1.008 05457-1447 - -0.27494 0.01022 237.9 2006.104 297.4 1.018 5407 A 2825 -0.06687 0.00140 0.07 1948.546 176.1 0.324 06450+1045 - -0.01961 -0.00479 253.7 1995.16 175.9 0.329 5671 BU 1022AB 0.30116 0.00009 0.30 1959.068 52.5 0.386 07008+2716 - -0.00581 0.00455 91.1 1997.22 51.9 0.389 6484 A 1578 -0.19533 -0.00468 0.30 1906.580 255.4 0.712 07573-0950 - 0.23354 -0.00392 320.1 1996.24 255.2 0.718 7360 A 1343 0.08806 0.00492 0.28 1983.778 45.9 0.316 09261+5344 - 0.26574 -0.00163 18.3 1997.23 46.7 0.318 8467 A 1849 0.02442 -0.00171 0.13 2033.656 26.9 0.135 12138+4643 - 0.12785 0.00033 10.8 1990.348 26.2 0.135 8508 A 2059 -0.02846 0.00790 0.50 1969.974 30.4 0.600 12194+1744 - 0.49901 0.00045 356.7 1991.32 31.0 0.605 8515 BU 605 -0.21236 -0.00852 0.36 1985.278 253.6 0.459 12202-2211 - -0.29380 0.00616 215.9 1996.1239 254.7 0.465 9810 A 21AB -0.26622 -0.00413 0.33 1965.325 276.7 0.462 15517-0559 - -0.20122 0.00546 232.9 1991.55 277.3 0.467 10257 BU 241 0.21911 0.00271 0.29 2043.912 24.4 0.321 16555-2134 - 0.19607 -0.00303 48.2 2008.5425 25.1 0.320 10648 A 1879 0.20819 0.00359 0.28 1918.658 107.8 0.570 17354+1322 - 0.19082 -0.00391 47.5 1995.60 108.1 0.575 10860 A 234AB 0.20410 -0.00021 0.20 2005.408 100.6 0.206 17526+2536 - -0.00999 -0.00422 92.8 1991.64 101.7 0.207 11619 A 2388 0.22122 -0.00002 0.22 1959.152 128.3 0.280 18440+0321 - -0.00146 -0.00326 90.4 1995.61 128.8 0.282 13681 A 286AB 0.14321 -0.00032 0.14 1959.342 41.4 0.191 20188+3507 - 0.01918 0.00237 82.4 2007.723 40.8 0.193 14766 A 884 0.21818 0.00397 0.38 1966.471 114.2 0.437 21133+4655 - -0.30719 0.00282 144.6 2000.4946 113.6 0.440 14821 A 1441AB -0.13721 -0.00107 0.15 1994.994 275.0 0.156 21171+4001 - 0.05712 -0.00257 292.6 2008.8577 274.0 0.157 14958 A 887AB -0.00817 -0.00251 0.10 2001.143 200.0 0.104 21254+1121 - -0.09978 0.00021 184.7 1996.5376 201.3 0.104 16010 A 1467 -0.26152 -0.00169 0.29 1981.679 270.2 0.313 22308+4007 - 0.11620 -0.00379 294.0 2008.8580 269.5 0.314 16702 BU 718AB 0.25198 -0.00422 0.37 1967.375 171.9 0.452 23219+3149 - -0.27373 -0.00389 137.4 2003.768 172.5 0.455 ========================================================================================== ANNOUNCEMENT THE CCDM A Catalog of Double and Multiple Stars in the continuation of the ancient ones. In the years before 1980, the idea of a very important astronomical space project was born in the French astronomical community and after a few year of discussions, it rapidly took shape. This idea was disseminated outside of France, especially in European and American countries. Meetings were organized and finally the European Space Agency (ESA) became involved. The project of the launch of a specific European Astrometric Satellite was accepted. Therefore, the contributions of the participating European Countries consisted of setting up three consortia: INCA, FAST, and NDAC, to: a) prepare the launch of the satellite, b) follow the mission, and c) take charge of the data reductions. This organization officially started working in the year 1980. The project consisted of observing 120,000 stars with INCA (INPUT CATALOG CONSORTIUM) in charge of the list. This list was called the INPUT CATALOGUE and contained a specific sub-list of double and multiple stars. Thus, FAST and NDAC were apparently not immediately involved but they had to prepare their programs for data reduction. Starting from a copy of the INDEX (1976.5)* of which the format was fundamentally changed (as imposed by the need for the satellite to receive individual data for each component), a sub-list of 14,711 systems was realized (Annex 1; vol 6, Double and Multiple Sytems of the Input Catalog, C. Turon et al.) for the launch of the satellite on July 9, 1989. After the Hipparcos launch, it seemed useful to publish this sub-list which had increased to 34,031 systems (Communications de l'Observatoire Royal de Belgique, S'erie A, no. 115, 1994) under the name of "Catalog of the components of double and multiple stars" (CCDM). The INDEX created by C. E. Worley, evolved with the new name, the "Washington Double Star Catalog" (WDS). Today, the CCDM contains some 68,000 systems (much less than the 116,000 of the WDS). But it contains an important improvement, contributed by Omer Nys, a co-author of the Catalog who, while retired, continued his very important work from the second edition (Observations et Travaux, no. 51, January 2007) until his death in January 2007. This contribution could have been lost if not accurately recorded. Both the WDS and CCDM cataloges are issued from the INDEX around the years 1975-1980, but evolved differently afterwards. The main difference between the two cataloges lies in their formats: while the WDS has one registration for each double star (even inside multiple sytems), the CCDM has one registration for each component. This was necessary in order to assign only one piece of data per parameter. The second edition (Observations & Travaux) contained only 49,300 systems. A detailed description will be published in O&T as soon as possible. We expect this event in mid-July 2012. J. Dommanget * As mentioned in all of our publications on the subject. ========================================================================================== KARL DRAGUTIN RAKOS (1925-2011) A native of Croatia in the former Yugoslavia, Karl Rakos earned his doctorate at the University Graz, Austria, in 1956. Soon thereafter he joined the Institute for Astronomy of the Vienna University, his home for the balance of a distinguished scientific and academic career. His research, from stellar astronomy to population studies in galaxies, included photometric and astrometric investigations of visual binaries by photoelectric area scanning, a technique of his creation. In recognition of his contributions to binary- star research, Commission 26 elected him as its president for the term of 1985-1988. With the death of Professor Karl D. Rakos, the astronomical community has lost an exceptionally creative and productive member. However, his legacy will live on through the significant contributions he has made to his beloved science, and in the careers he has launched and fostered as an inspiring teacher and caring mentor. Otto Franz ****************************************************************************************** The deadline for contributions to Information Circular No. 178 is: October 15th 2012 J. A. Docobo (joseangel.docobo@usc.es) J. F. Ling (josefinaf.ling@usc.es) Tel: +34 981592747 Fax: +34 981597054 Observatorio Astronomico "R. M. Aller" P. O. Box 197 Universidade de Santiago de Compostela SPAIN ISSN: 1024-7769

INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS) INFORMATION CIRCULAR No. 178 (OCTOBER 2012) NEW ORBITS ADS Name P (yr) T e W(2000) 2012 Author RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2013 ---------------------------------------------------------------------------------------- - COU 247 159.51 2005.80 0.309 21.1 241.4 0.330 DOCOBO 00095+1907 2.2569 0.543 137.0 103.4 2010.635 237.3 0.341 & CAMPO 449 MCA 1Aa,Ab 27.41 1988.97 0.807 105.3 267.1 0.146 MASON & 00324+0657 13.1339 0.160 111.2 13.0 2008.7672 262.8 0.115 HARTKOPF 1992 A 1278 108.59 2000.64 0.711 131.0 305.9 0.187 DOCOBO 02382+4604 3.3152 0.234 104.7 73.5 2010.8915 305.1 0.194 & CAMPO - FIN 312 2.6512 2012.3109 0.230 90.2 68.8 0.090 DOCOBO & 02396-1152 135.7876 0.1063 24.2 40.8 2009.7535 251.3 0.112 ANDRADE - RST2333 225.0 1949.2 0.256 15.4 182.9 0.327 DOCOBO 04093-2025 1.6000 0.498 80.9 358.7 2010.065 183.4 0.338 & CAMPO - GLE 1 296.3 1995.9 0.523 127.2 208.1 0.334 DOCOBO 04163-6057 1.2153 0.666 31.8 19.0 2010.8915 211.5 0.340 & LING 4038 MCA 19Aa,Ab 15.84 1982.80 0.820 251.5 77.0 0.087 MASON & 05272+1758 22.7273 0.077 109.2 315.3 2007.8260 72.7 0.066 HARTKOPF 4038 MCA 19Aa,Ab 30.54 1982.20 0.046 86.21 72.3 0.068 MASON & 05272+1758 11.7878 0.111 101.4 61.0 2007.8260 63.8 0.050 HARTKOPF - WOR 19 50.14 2000.13 0.184 63.0 202.5 0.522 RICA 08286+3502 7.1801 0.604 136.0 123.7 2011.3484 195.6 0.513 & ZIRM - FIN 347Aa,Ab 2.7043 1979.9904 0.417 318.3 90.8 0.072 MASON & 09123+1500 133.1213 0.117 122.4 351.5 2007.1857 189.7 0.078 HARTKOPF (*) - MCA 34 15.28 1973.55 0.318 203.0 30.1 0.131 MASON & 09474+1134 23.5556 0.111 75.9 23.9 2007.1857 34.6 0.112 HARTKOPF - FIN 47AB 7.603 1983.460 0.353 224.7 41.0 0.123 MASON & 11053-2718 47.3491 0.137 95.0 342.9 2009.2653 0.7 0.014 HARTKOPF 8739 BU 1082 105.06 1921.53 0.405 94.8 105.9 1.042 SCARDIA 13007+5622 3.4266 1.220 49.6 113.2 2012.413 108.8 0.996 et al. (**) 8862 HU 644 48.73 1968.41 0.214 91.2 89.9 1.249 MASON & 13198+4747 7.3876 1.518 94.5 72.4 2010.2070 89.0 1.137 HARTKOPF - SLR 19 366.9 1884.3 0.119 292.2 325.1 1.173 SCARDIA 14077-4952 0.9812 1.420 57.0 274.4 2009.260 325.9 1.165 PANSECCHI 9532 B 2351Aa,Ab 23.46 1971.13 0.244 174.50 315.3 0.132 MASON & 15122-1948 15.3453 0.129 154.2 341.5 2009.2657 301.4 0.121 HARTKOPF - HWE 78AC 1258. 2216. 0.343 40.0 120.5 1.447 LING 15313-3349 0.2862 1.689 157.4 16.7 2011.3028 120.2 1.444 9781 HU 657 371.5 1974.3 0.740 162.0 178.7 0.452 DOCOBO 15457+5040 0.9690 0.581 123.9 202.7 2008.4611 178.1 0.462 & LING - SEE 264AB 150.51 1976.01 0.138 154.3 15.5 0.795 DOCOBO 16057-3252 2.3919 0.896 140.5 29.5 2012.3539 13.3 0.808 & LING - KUI 83AB 24.107 1961.173 0.205 157.1 253.5 0.236 MASON & 17372+2754 14.9334 0.286 162.5 206.8 2008.5460 234.0 0.250 HARTKOPF 10954 HU 1185 240.0 1951.4 0.650 14.6 141.0 0.378 DOCOBO 17591+3228 1.5000 0.383 49.1 324.2 2009.442 141.8 0.383 & CAMPO - FIN 357 14.159 2018.474 0.355 116.0 84.7 0.202 DOCOBO & 19035-6845 25.4255 0.154 155.9 205.8 2008.7724 71.5 0.192 ANDRADE - KUI 93 65.17 2026.36 0.985 164.3 316.0 0.168 DOCOBO 19411+1349 5.5240 0.163 67.5 300.3 2010.5909 316.4 0.164 & LING 12880 STF2579AB 918.1 1884.5 0.520 95.7 218.8 2.702 SCARDIA & 19450+4508 0.3921 3.408 146.9 129.7 2012.687 218.3 2.710 et al. (**) - MLR 60AB 50.00 1963.90 0.035 176.0 153.9 0.148 DOCOBO & 20154+6412 7.2000 0.239 107.5 68.2 2008.648 147.3 0.127 ANDRADE - I 22AB 198.04 2001.69 0.763 175.0 175.3 0.532 ZIRM 22553-4828 1.8178 0.965 87.3 256.7 2009.6679 175.5 0.561 17111 A 2100 88.95 1990.94 0.768 116.0 255.5 0.366 MASON & 23568+0444 4.0472 0.274 152.0 66.6 2008.8875 254.2 0.373 HARTKOPF (*) Combined solution orbit. Mass_a = 0.983 +- 0.045Msun, Mass_b = 0.903 +- 0.049Msun, orbital parallax = 48.78 +- 2.36 mas. (**) SCARDIA, PRIEUR, PANSECCHI & ARGYLE ========================================================================================== ANNOUNCEMENTS * Presentations from the Commission 26 meeting at the IAU General Assembly in Beijing are available online at: http://ad.usno.navy.mil/wds/dsl/Comm26/Beijing/beijing.html Brian Mason * TYCHO 40-501-1: A possible new double (triple) star On Oct. 23rd 2004 (2004.813 in Besselian Epoch), while testing the adaptive optics for the Galileo National Telescope (TNG) at La Palma (Canary Islands), R. Ragazzoni, M. Cecconi, S. Desidera, J. Farinato, and A. Ghedina, discovered that the star Tycho 40-501-1 (R.A. 02h 02m 23.548s; Dec. +04d 19' 19.78" ; mv 10.72) has a companion in position angle theta = 127.5 deg with separation rho = 0."35. A check performed with the SIMBAD database allowed to realize that there is a third, fainter, companion distant rho = 14".3, in position angle 339 deg. Further observations, always made with the adaptive optics of the TNG on Nov 09th 2006 and Aug 16th 2007, confirmed the presence of the nearest companion in the same position. Its estimated visual magnitude is mv=12.0 whereas the one of the most distant companion is mv=13.5. The SIMBAD database reports for TYCHO 40-501-1 also the magnitude in V (10.72) and B (11.49). Should such star belong to the main sequence, then the colour index B-V = 0.77 would allow to assign to TYCHO 40-501-1 the spectral type K0V to which corresponds an absolute magnitude Mv=6. On the other hand, spectra taken with SARG (the TNG cross dispersed echelle spectrograph) by A. Fiorenzano on November 10th 2006 and August 14th 2007, with resolution 144,000, denote that the object is a star of spectral type G with a low rotational speed. The small discrepancy with the colours might be likely due to reddening. So, the precise spectral class remains somewhat uncertain. However, it should be between G and early K. Now, by applying the relation that bind together mv, Mv, and the distance d from the Sun, a 0".114 parallax results. Further, in the simplified hypothesis that the radius vector connecting the two stars is orthogonal to the line of sight, the distance between the two components turns out to be 30 AU. For what above, the system TYCHO 40-501-1 AB could well be a physical couple. Of course, further observations will be necessary to confirm such conclusion. Recapitulation: TYCHO 40-501-1 AB 2004.813 0".35 127.5deg 10.7 12.0 TYCHO 40-501-1 AC 2004.813 14".3 339.0 10.7 13.5 P.S. As the adaptive optics of the TNG have been caste off since some years, it is no more possible to observe again this couple with said telescope in order to catch the possible orbital motion. M. Scardia, L. Pansecchi, R. Ragazzoni, M. Cecconi, S. Desidera , J. Farinato, A. Fiorenzano and A. Ghedina * Erratum in Information Circular No. 177: In the entry for WDS 20157+4339 (A 2095 AB), the value of the Omega (2000) should be 147.5, rather than 101.6. ****************************************************************************************** The deadline for contributions to Information Circular No. 179 is: February 15th 2013 J. A. Docobo (joseangel.docobo@usc.es) J. F. Ling (josefinaf.ling@usc.es) Tel: +34 981592747 Fax: +34 981597054 Observatorio Astronomico "R. M. Aller" P. O. Box 197 Universidade de Santiago de Compostela SPAIN ISSN: 1024-7769