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The Bright Star Catalogue, also known as the Yale Catalogue of Bright Stars or Yale Bright Star Catalogue, is a star catalogue that lists of all stars of stellar magnitude 6.5 or brighter, which is roughly every star visible to the naked eye. It is currently available online in its 5th edition from several sources. Although the abbreviation for the catalog is BS or YBS, citations of stars indexed in the catalog use HR before the catalog number, after the catalog's 1908 predecessor, the Harvard Revised Photometry Catalogue produced by the Harvard College Observatory.
