Washington Double Star Catalog

The Washington Double Star Catalog, or WDS, is a catalog of double stars, maintained at the United States Naval Observatory.

The catalog contains positions, magnitudes, proper motions and spectral types and has entries for (as of January 2024) 157,012 pairs of double stars.

In 1965, under the initiative of Charles Worley, it was transferred to the Naval Observatory.

[1] The catalog has since been augmented by many measurements, mainly from the Hipparcos and Tycho catalogues and results from speckle interferometry, as well as other sources.

A unique 1–3 letter discovery code is used to identify the observer who reported the information.