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This category contains stars from the Henry Draper Catalogue (HD), or its extensions (HDE) and (HDEC). Help keep this category in order, modify [[Category:Henry Draper Catalogue objects]] to [[Category:Henry Draper Catalogue objects|######]] , dropping the HD or HDE or HDEC prefix, using only the number, on pages that categorize here.
HD — Henry Draper Catalogue; HDE — Henry Draper Extension; HDEC — Henry Draper Extension Charts; HdO — Harvard Observatory USA, and stations elsewhere (double stars) HDW — Hartl-Dengel-Weinberger (planetary nebulae) Hdz — Harvard Zone Catalogues (double stars) HE — Hamburg/ESO Survey; He — Henize (planetary nebulae)
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 ...
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The following is a list of NGC objects, that is objects listed in the New General Catalogue (NGC). It is one of the largest comprehensive astronomical catalogues for deep sky objects such as star clusters, nebulae, and galaxies. List of NGC objects (1–1000) List of NGC objects (1001–2000) List of NGC objects (2001–3000)
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The Principal Galaxies Catalogue (PGC) is an astronomical catalog published in 1989 that lists B1950 and J2000 equatorial coordinates and cross-identifications for 73,197 galaxies. It is based on the Lyon-Meudon Extragalactic Database (LEDA), which was originally started in 1983. [2] 40,932 coordinates (56%) have standard deviations smaller ...
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