Bright Star Catalog
(HR, BS, YBS, Yale Catalogue of Bright Stars, Yale Bright Star Catalogue)
(early 20th century catalog of 9000 stars)
The Bright Star Catalog (or
Yale Catalogue of Bright Stars or Yale Bright Star Catalogue,
abbreviated BS or YBS, with entries cited as HR)
is an astronomical catalog of 9000 stars.
It began as the Harvard Revised Photometry Catalog
(thus the designation string "HR") in the early 20th century,
and has been repeatedly enhanced throughout the century.
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