sponsored by psychohistorian.org
Type: galaxy (in group), S
Mag: B=11.9, V=?
Size: 1.445′ x 1.445′
Synonyms: H II-177
Discovered in 1784 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "pF, not S, lbM, r."
Burnham calls it pretty bright, pretty small, gradually brighter in the middle and measuring 1.0' by 0.9'.
The RNGC (Sulentic and Tifft 1973) notes that this is a 13.0 mag galaxy. Their coded description reads R,UHISB,DIFARC NF.
This spiral in Bootes has a tiny 1' disc, and needs powers of 100x or so to be identified easily. Of 12th mag, it is within the grasp of a 6" It is often overlooked as there are no bright stars nearby to point the way.
POSS: string of *s not obvious. m10.5 * 7'.8 NE. m12 *s ~4'.5 N & SE.
15cm - not vis.
- mod f modsfcbr oval @ 80x. 140x: 1'.5x1'. elong E-W, a fat oval. strong
broad concen---no core or nuc. m15.5 * WNW, long axis ~sep to it. BS,
7Jun1991, Anderson Mesa.
25cm - easily seen at the E end of a string of *s. quite sm, centrally concen w/
*ar nuc. evenly diffuse edges.
- core appears E of center. BS, Big Cypress.
30cm - nice: broad circ core @ 140x. mod broad concen to 1' core, vlittle halo
to 1'.25 diam. no distinct nuc, but there are some f *ings in inner
regions. located 8' SW of m11 *. m12.5 *s N & SE @ 5' form w/m11 * a
symmetric kite pointing NE.
Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "12.4M; 1' diameter; small and round with little brighter center; marks the fourth corner of a 15'-diameter quadrangle with three 12M stars."
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.