Technique                       Total|Mean Sep. (as)|Median Sep. (as)
 A  Adaptive Optics                  21771          3.401          1.580 
 C  CCD (long focus)                109676         21.009          8.970 
 D  Heliometer                        1702         30.619         10.475 
 E  Wide-field CCD                  562669         46.200         14.633 
 H  Space-based technique           584092         40.082          8.882 
 I  Interferometry                     906          0.269          0.164 
 J  Visual Interferometer             4180          0.213          0.128 
 K  Long-Baseline Interferometer      4107          0.520          0.063 
 M  Micrometer                      424815         10.245          2.140 
 O  Occultation                       2377          0.380          0.100 
 P  Photography                     180455         31.961         13.100 
 S  Speckle Interferometer          100608          1.026          0.434 
 T  Transit Instrument               10903        145.759         41.890 
 V  Visual Estimate                     55          6.771          2.000 
 X  Spectroscopy                       531         13.929         10.000 
 Z  Photometer                       99574         37.102         19.480 
 -  Unknown                           2449         75.663         13.600