Technique                       Total|Mean Sep. (as)|Median Sep. (as)
 A  Adaptive Optics                  24427          3.154          1.189 
 C  CCD (long focus)                117627         21.011          8.900 
 D  Heliometer                        1732         31.211         10.525 
 E  Wide-field CCD                  569765         46.127         14.640 
 H  Space-based technique           645285         41.111          8.753 
 I  Interferometry                     907          0.273          0.164 
 J  Visual Interferometer             4181          0.213          0.128 
 K  Long-Baseline Interferometer      5223          0.426          0.047 
 M  Micrometer                      425375         10.252          2.140 
 O  Occultation                       2449          0.578          0.100 
 P  Photography                     186068         33.050         13.330 
 S  Speckle Interferometer          136333          1.265          0.478 
 T  Transit Instrument               10917        145.782         42.040 
 V  Visual Estimate                     62         54.657         12.600 
 X  Spectroscopy                       536         14.060         10.000 
 Z  Photometer                      100027         37.102         19.480 
 -  Unknown                           2403         76.869         13.900