An Etymological Dictionary of Astronomy and Astrophysics

A stellar catalog which is the world’s principal database of astrometric → double star information. It is maintained by the United States Naval Observatory. The WDS Catalog contains positions (J2000), discoverer designations, epochs, position angles, separations, magnitudes, spectral types, proper motions, and, when available, Durchmusterung numbers and notes for the components of 142552 systems (as of Feb 27 2018).

See also: Washington, referring to the location of the United States Naval Observatory in Northwest Washington, D.C; → double; → star; → catalog.