sponsored by psychohistorian.org
Type: galaxy (AGN LINER-type), Sab
Mag: B=14, V=?
Size: 1.659′ x 0.707′
Select a sketch and click the button to view
Synonyms: H II-482
Discovered in November 1785 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "Four. The preceding two [NGC 833 & NGC 835] both F, E, S, within 1' distance, in the parallel. The following two [NGC 838 & NGC 839] both pF, pS, E, about 2' distant and nearly in the direction of the meridian."
Observed by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "eF, S, R; first of a group of four."
Recorded in "Observations of the Southern Nebulae made with the Great Melbourne Telescope".
See the discussion of Lithograph M.1.7 for the details.
An observer using the 72-inch f/8.8 speculum telescope at Birr Castle noted "[NGC 833, NGC 835, NGC 838 and NGC 839] Nov. 29, 1856. All are S, R, bM."
F, S, vmE 80deg, spindle with nucleus.
This group consists of NGC 833, NGC 835, NGC 838 and NGC 839. The grouping is listed as No. 318 in Arp's "Atlas of Peculiar Galaxies" (Astrophysical Journal Supplement, vol. 14, 1966.) He remarks "faint, diffuse streamers, peculiar galaxies."
The RNGC (Sulentic and Tifft 1973) notes that this is a 14.0 mag galaxy. Their coded description reads SLIRREL,BM,SLDIF.
The Messier objects
The Bennett objects
The Caldwell list
DOCdb is still in beta-release.
Known issues, feature requests, and updates on bug fixes, are here:
Found a bug? Have a comment or suggestion to improve DOCdb? Please let us know!
DOCdb is a free online resource that exists to promote deep sky observing.
You could help by sharing your observations, writing an article, digitizing and proof-reading historical material, and more.
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.