Technique                       Total|Mean Sep. (as)|Median Sep. (as)
 A  Adaptive Optics                  23669          3.259          1.400 
 C  CCD (long focus)                115473         20.871          8.875 
 D  Heliometer                        1702         30.619         10.475 
 E  Wide-field CCD                  568783         46.162         14.650 
 H  Space-based technique           639331         40.973          8.766 
 I  Interferometry                     907          0.273          0.164 
 J  Visual Interferometer             4180          0.213          0.128 
 K  Long-Baseline Interferometer      4899          0.443          0.053 
 M  Micrometer                      425135         10.246          2.140 
 O  Occultation                       2383          0.384          0.100 
 P  Photography                     183758         32.836         13.241 
 S  Speckle Interferometer          123052          1.008          0.450 
 T  Transit Instrument               10916        145.787         42.022 
 V  Visual Estimate                     55          6.771          2.000 
 X  Spectroscopy                       536         14.060         10.000 
 Z  Photometer                       99733         37.102         19.480 
 -  Unknown                           2424         76.215         13.640