sponsored by psychohistorian.org
RA: 17h 51m 48.94s
Dec: +23° 04′ 19.1″
Ch: MSA:1201, U2:158, SA:8
Type: galaxy (in group), E
Mag: B=12.8, V=?
Size: 2.089′ x 1.819′
Sketched and described.
The RNGC (Sulentic and Tifft 1973) notes that this is a 12.5 mag galaxy. Their coded description reads E,R,BM,HISB,RI*FIELD.
Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "12.2M; 40" x 30" extent; small, faint oblong with very much brighter center and stellar nucleus; tough to separate from crowded background; makes right triangle with 12M star 3' to NW and 12.5M star 3.5' to NE."
(e-mail: firstname.lastname@example.org, web: http://www.west.net/~jbc/)
Instrument: 8-inch Dobsonian reflector Location: Carpinteria, CA, USA
Light pollution: light Transparency: good Seeing: fair
Time: Sun Jun 29 08:30:00 1997 UT Obs. no.: 165
Unable to spot this m12.2 E3 galaxy. Pretty sure I was looking at the right place, but no sign of it at 49x.
POSS: pa~60. * vis only on E print, still burned in. triangle *s: m10.5
2'.4 NW; m11 2'.6 NE.
15cm - * seen.
- spotted @ 50x but mistaken for dbl * until fld correctly ident. 140x & 295x: looks like m13 * sup on WSW side of otherwise f gx. can't tell much about gx other than it's not lg. BS, 29Jun1989, Anderson Mesa.
25cm - vsm, pretty f w/m12.5 * inv on W side. elong ~E-W, 0'.7x0'.5. can't tell about core or nuc properties due to *.
30cm - startlingly-br * embedded in gx is misleading: gx mostly E of m13.5 *. quite sm, < 1' diam, elong confusing due to off-center *, but seems elong E-W(?). not very concen for ellip type; * seems more obvious at 149x than at higher power.
- found as S point of triangle of m12 *s 1'.5 on-a-side. vsm w/br *ar nuc. at 238x nuc dominates w/50" gx having definite edges. perhaps dk spots, but maybe only contrast w/nuc.
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.