Washington Double Star Catalog
Astronomical catalog / From Wikipedia, the free encyclopedia
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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 June 2017) 141,743 pairs of double stars. The catalog also includes multiple stars. In general, a multiple star with n components will be represented by entries in the catalog for n-1 pairs of stars.
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