sponsored by psychohistorian.org
Type: galaxy, Sab
Mag: B=12.55, V=11.9
Size: 3.311′ x 1.047′
NGC 3955. See IC 2970.
Synonyms: H II-623
Discovered in 1786 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "F, S, E in the meridian or few degrees np-sf. a little brighter suddenly in the middle."
The RNGC (Sulentic and Tifft 1973) notes that this is a 13.0 mag galaxy. Their coded description reads EL,BM,HISB,INTDKPCHS.
Steve Coe, using a 13" f/5.6, notes: "Pretty faint, pretty small, much elongated (2.5 X 1) in PA 165 with a bright middle at 165X."
POSS: SB:bc: I: [BS] in pa166. pec bar laterally across NW side. 4'.6 SW
of SAO180282 (mv8.9, F8). m14-14.5 * 1'.0 NNW off NNW tip.
13cm - 60x: just vis 5' SW of m9 * on AE. elong N-S. 5Jun1983, USNO.
30cm - 125x: sm, thin, 1'.5x0'.5 in pa150. sl broad concen. threshold * lies
1' NNW, W of gx. 250x shows f non*ar nuc. 5Jun1983, USNO.
16-inch f/10 SCT (290x)
Elongated in a north south shape, faint but with a slightly darker southern side. The brightest star 9 magnitude is on the eatern side, with a very faint star north west on the outer tip of the galaxy. Elongated soft haze NNW-SSE slowly brighten to the core.
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.