Henry Draper Catalogue

Henry Draper Catalogue
Named after	Henry Draper
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The Henry Draper Catalogue (HD) is an astronomical star catalogue published between 1918 and 1924, giving spectroscopic classifications for 225,300 stars; it was later expanded by the Henry Draper Extension (HDE), published between 1925 and 1936, which gave classifications for 46,850 more stars, and by the Henry Draper Extension Charts (HDEC), published from 1937 to 1949 in the form of charts, which gave classifications for 86,933 more stars. In all, 359,083 stars were classified as of August 2017.^[1]^[2]

The HD catalogue is named after Henry Draper, an amateur astronomer, and covers the entire sky almost completely down to an apparent photographic magnitude of about 9; the extensions added fainter stars in certain areas of the sky.^[3] The construction of the Henry Draper Catalogue was part of a pioneering effort to classify stellar spectra, and its catalogue numbers are commonly used as a way of identifying stars.^[4]^[5]

^ Nesterov, V. V.; Kuzmin, A. V.; Ashimbaeva, N. T.; Volchkov, A. A.; Röser, S.; Bastian, U. (1995). "The Henry Draper Extension Charts: A catalogue of accurate positions, proper motions, magnitudes and spectral types of 86933 stars". Astronomy and Astrophysics Supplement Series. 110: 367. Bibcode:1995A&AS..110..367N. CDS ID III/182.
^ Cite error: The named reference hde was invoked but never defined (see the help page).
^ "HD (S0): HENRY DRAPER star catalog, edition 1985 (19930406)". HyperSky. Willmann-Bell, Inc. 1996. Archived from the original on May 9, 2008.
^ Cite error: The named reference webb was invoked but never defined (see the help page).
^ Cite error: The named reference galaxies was invoked but never defined (see the help page).

[Nesterov-1] Nesterov, V. V.; Kuzmin, A. V.; Ashimbaeva, N. T.; Volchkov, A. A.; Röser, S.; Bastian, U. (1995). "The Henry Draper Extension Charts: A catalogue of accurate positions, proper motions, magnitudes and spectral types of 86933 stars". Astronomy and Astrophysics Supplement Series. 110: 367. Bibcode:1995A&AS..110..367N. CDS ID III/182.

[hde-2] Cite error: The named reference hde was invoked but never defined (see the help page).

[Bell-3] "HD (S0): HENRY DRAPER star catalog, edition 1985 (19930406)". HyperSky. Willmann-Bell, Inc. 1996. Archived from the original on May 9, 2008.

[webb-4] Cite error: The named reference webb was invoked but never defined (see the help page).

[galaxies-5] Cite error: The named reference galaxies was invoked but never defined (see the help page).

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