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Type: galaxy (Seyfert), Sb
Mag: B=12, V=?
Size: 5.128′ x 2.57′
Synonyms: H II-766
Discovered in 1788 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "pB, cL, iE, resolvable."
The RNGC (Sulentic and Tifft 1973) notes that this is a 12.0 mag galaxy. Their coded description reads S,EL,DKLNS,DIFWDSSTR.
Photo Index by Jim Lucyk: Sky&Tel. 2/81 p101, Astronomy mag. 4/87 p106, Burnhams V2 p873, Rev.Shapley-Ames Cat.of Bright Gal. (Sandage,Tammann 1981) p117.
Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "12M; 4' x 2' extent; large and soft, N-S-oriented spiral arm assembly surrounds bright stellar core; 10M star 5' NNE of core; EL GAL N5982 (12.4M; 1.1' x 0.7' extent) bright core in small fuzz 7' to W."
Lick: halo pa20, core pa0.
POSS: no *ing nr center; gx symmetrical.
15cm - barely. Roof.
- fairly f, but not much harder than -82 due to size. 125x gives 2'.5x1'.
core is off-center, inconsp, and more nrly circ than in 25cm. BS,
6Jun1981, Slate Mtn.
25cm - pa0, 1'.5x1'. little brtr to cen. Roof.
- 190x: pa20, 3'x1'.2. sm inconsp oval core 0'.3x0'.1 is off-center to N.
* or *ing a bit W of geom center, m14.5, at SW edge of core. sfc
mottled and of modlosfcbr, but fades suddenly at edge. BS, 6Jun1981,
30cm - broad, poorly concen blob 4'x3'.5 in pa N-S. core 0'.8, halo mottled.
modlosfcbr. lies 7'.7 E of -82.
Observing site: Little Tycho Observatory
[15h 39m 36s, 59° 20m 0s] A very faint, small smudge. Almost a not seen. This should be revisited in dark skies with the C-11.
Observing site: Little Bennett Regional Park
[15h 39m 36s, 59° 20m 0s] Still a faint, elongated smudge.
The Messier objects
The Bennett objects
The Caldwell list
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