This catalog is a compilation of seven catalogs of positions derived from observations with the six-inch transit circle of the U. S. Naval Observatory. The observations were obtained between 1911 and 1971 and were published in the catalogs: W210, W025, W150, W250, W350, W450, and W550. Proper motions and, in most catalogs, spectral types were added from other sources.
Cone search capability for table I/100A/w10 (W210)
Cone search capability for table I/100A/w25 (W025)
Cone search capability for table I/100A/w50 (W150, W250, W350, W450, and W550)