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Space Facts






The Henry Draper (HD) Star Catalog

Henry Draper (1837–1882 CE), a doctor and amateur astronomer, contributed greatly to early photographic astronomy. After his death, his wife established a memorial fund which was later used to support a photographic stellar spectrum survey named, the Henry Draper Catalog.

The original catalog contained nearly a quarter million stars. The 1949 extension (HDE) added over 100,000 more stars, bringing the total to nearly 360,000 stars.

References: http://www.ras.ucalgary.ca/~gibson/draper/
http://en.wikipedia.org/wiki/Star_catalogue