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RA: 23h 38m 56.6s
Dec: −12° 57′ 35″
Ch: MSA:1328, U2:304, SA:17
Type: galaxy (in pair), SBb
Mag: B=11, V=?
Size: 3.311′ x 2.238′
Synonyms: H I-110
Discovered in 1785 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "cB, cL, lE, gmbM, iF."
This barred spiral galaxy was recorded by both Herschels, and is described as considerably bright, considerably large, elongated, gradually much brighter towards the middle with a mottled appearance.
Sir John notes that his father calls it "considerably bright" in two observations, whereas he himself has seen in as "extremely faint", adding "sky quite clear." Dreyer notes that "d'Arrest places it among the brighter nebulae of the second class", Schonfeld has "faint, diffused" and Lord Rosse has "pretty bright."
pB, 3'x2', lE 40deg approx., B stell N.; a remarkably pretty little spiral.
Burnham gives it size as 3' x 2'.
A supernova erupted in this galaxy in 1975 (13.9v)
The RNGC (Sulentic and Tifft 1973) notes that this is a 12.0 mag galaxy. Their coded description reads EL,BM,DIFPERIPH PERIPH DKLNS.
Listed by the Herschel Club, described as "extremely faint, small, roughly circular. Used averted vision to make out this elusive object, surface brightness is low. Located near a 5th mag field star. 6-inch, 43x."
Houston calls this a "small and formless 11th mag glow."
Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "12.1M; 3' x 2' extent; soft oblong with little brighter center; 20' to WSW is DBL ST ADS 16878 (33" separation @ PA 093; 5.7-9.6M); 40' to NNE is SP GAL N7727."
POSS: SB(rs)bII-III in pa45:. no br *s nrby as per 6cm obs.
6cm - just vis w/f * to N @ 35x.
15cm - lg mod br gx @ 80x. 140x: elong NE-SW, a broad 2'.5x1'.75 oval. reaches
halfway to m14 * 2'.5 SW. mod-strong broad concen in halo; vsm oval core
much brtr, and *ar nuc. occas sl mottled in halo. BS, 14Oct1990, Anderson
25cm - ill-def edges. defined core, perhaps *ar nuc. notches in edges of halo,
but no other detail. BS, Roof.
30cm - lox shows elong in pa60. oval, lo concen at hix, 3'x2' w/f *ar nuc
embedded in 1' oval, mottly core. CBL, Roof.
The Messier objects
The Bennett objects
The Caldwell list
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