HD
Abbreviation: Henry Draper Catalog. The HD is a star catalog published in the Annals of Harvard College Observatory between 1918 and 1924. It provides spectroscopic classifications for 225,300 stars.
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Abbreviation: Henry Draper Catalog. The HD is a star catalog published in the Annals of Harvard College Observatory between 1918 and 1924. It provides spectroscopic classifications for 225,300 stars.
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