The completeness of USNO-B detections of high proper motion ({mu}>180mas/yr) stars is tested, and the accuracy of its measurements is compared to the revised New Luyten Two-Tenths catalog of Salim & Gould (2002ApJ...575L..83S). For 14.5<V<18.5, only 6% of such stars are missing from USNO-B (Cat. ), while another 3% have large errors, mostly too large to be useful. Including both classes, incompleteness is 9%. These fractions rise toward both brighter and fainter magnitudes. Incompleteness rises with proper motion to 30% at {mu}=1"/yr. It also rises to 35% at the Galactic plane, although this is only determined for relatively bright stars V~20mas/yr) may actually have still larger errors than tabulated.

Cone search capability for table J/AJ/126/472/table1 (Binary Sample)