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DOCdb

Deep Sky Observer's Companion – the online database

 

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Entire DOCdb database of 18,816 objects.

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NGC 4933 (18,696 of 18,816)

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NGC 4933

NGC 4933, II 191, GC 3377

History and Accurate Positions for the NGC/IC Objects (Corwin 2004)

NGC 4933. This has two components, the brighter one to the northeast. Bigourdan misidentified his comparison star one of the two nights he observed this, so the two components have IC numbers, I4173 and I4176, as well.

The misidentified star led Bigourdan to believe that he had found a third "nova" in the field, too. See IC 4134 = NGC 4920 for the details.

Historical observations

William Herschel (c.1784)

Synonyms: H II-191

Discovered in 1784 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "pF, pS, R, r, near some small stars."

Published comments

Arp (1966)

Listed as No. 176 in Arp's "Atlas of Peculiar Galaxies" (Astrophysical Journal Supplement, vol. 14, 1966.) He remarks "companion galaxy very condensed."

Modern observations

Steve Coe

Steve Coe, observing with a 13" f/5.6, notes: "faint, pretty small, elongated 2X1, brighter middle at 135X. There is a knot in the arm or a companion in the western arm."

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Lacaille's catalogue

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Everything on DOCdb.net is © 2004-2010 by Auke Slotegraaf, unless stated otherwise or if you can prove you have divine permission to use it. Before using material published here, please consult the Creative Commons Attribution-Non-Commercial-Share Alike 2.5 License. Some material on DOCdb is copyright the individual authors. If in doubt, don't reproduce. And that goes for having children, too. Please note that the recommended browser for DOCdb is Firefox 3.x. You may also get good results with K-Meleon. Good luck if you're using IE. A successful experience with other browsers, including Opera and Safari, may vary.