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Type: galaxy, SBb
Mag: B=12, V=?
Size: 2.398′ x 1.23′
Discovered in 1785 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "pB, iR, mbM, south-preceding a pretty considerable star."
The RNGC (Sulentic and Tifft 1973) notes that this is a 12.5 mag galaxy. Their coded description reads S,SLDIF,BM,DKLNS KNY ARMS.
Photo Index by Jim Lucyk: Burnhams V2 p1098, Hubble Atl.of Gal. (Sandage 1961) p21.
This galaxy appears on page 21 of "The Hubble Atlas of Galaxies" by Allan Sandage (1961, Washington, DC).
05 12.1 -15 41
13: fairly bright, bright core, slightly elongated ~N-S. A mag 11 star is
1.0' E of center.
Tom Lorenzin, in the electronic version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "12.2M; 2'x 1' extent; fairly bright oblong with brighter center; 11M star 1.5' due E of core; 30' NNW of 3M Mu LEP; see photo at HAG-21."
Steve Coe, observing with a 13" f/5.6, notes: "Pretty bright, pretty large, somewhat elongated, brighter in the middle at 100X."
POSS: bar in pa164, halo in pa~25. m10.5 * 67" E.
15cm - mod f gx W of m11.5 * @ 80x. 140x: 1'.5 diam, nrly touching * on E. mod
even concen to *ar nuc. BS, 15Nov1993, LCO.
25cm - mod f; cen bar in pa150. on ENE is m10.5 *. 1'.5x1'.2. f *ar nuc, 20"
core not consp. well-def halo.
30cm - brtr core is 1' W of m10.5 *. f *ar nuc. 220x: elong in pa20 w/circ
core 1'.2 diam, plus *ar nuc. 2'.8x1'.4 overall. the br part of core
seems in pa160.
Instrument:12-inch Dobsonian Reflector Telescope.
Sky Conditions:The fainter parts of the Milky Way are barely visible.
Transparency of the Sky:Haziness only visible on the horizon.
Seeing:Atmosphere stable with little interference.
First Impression:This object looks like a fuzzy object.
Chart Number:No.95(Extract taken out of "Star Gazer's Deep Space Atlas").
Size:26mm super wide angle eyepiece:Field Of View:57'/14=4'.
20mm ultra wide angle eyepiece:Field Of View:50'/12.5=4'.
4'+ 4'= 8'.
8'+ 2= 4'.
Size in Arc Minutes:4'.
Galaxy is 4'* 1.3'.
Brightness Profile:From the far outskirts to the nucleus of this galaxy it becomes brighter.
Challenge Rating:Very Difficult.
At 75* I have found that this galaxy has a round shape and it has a faint galactic nucleus.This galaxy is very faint and has a low surface brightness.Around this galaxy some faint stars are observed although there is no areas of uneven brightness.
Observing site: Little Bennett Regional Park
[5h 12m 6s, -15° 41' 0"] A small, bright streak, in pa ~ 180°. Burnham: Sc.
The Messier objects
The Bennett objects
The Caldwell list
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