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RA: 16h 32m 20.96s
Dec: +19° 49′ 35.5″
Ch: MSA:1229, U2:156, SA:8
Type: galaxy (in cluster), Sc
Mag: B=12.7, V=?
Size: 2.454′ x 1.047′
Synonyms: H II-753
Discovered in 1788 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "pF, pS, vlE, mbM."
Two supernovae erupted in this galaxy; 1926 (14.2p), 1951 (15.7p)
The RNGC (Sulentic and Tifft 1973) notes that this is a 13.0 mag galaxy. Their coded description reads S,HISB,VDIFARM NORTH S ARM SHORT BKNWD.
This galaxy appears on page 29 of "The Hubble Atlas of Galaxies" by Allan Sandage (1961, Washington, DC).
Photo Index by Jim Lucyk: Hubble Atl.of Gal. (Sandage 1961) p29.
Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "12.5M; 2'x 1' extent; see photo at HAG-29."
POSS: m10.5-11 * 2'.4 W/sl N. m12.5-13 * 1'.4 SW (pa208). gx in pa0 in
core & halo.
15cm - f, E of m10.5 *. f * S forms triangle w/gx and br *.
- mod br @ 50x. 140x: forms triangle w/m11 * W and m12.5 * S. 1'.5x0'.75
in pa170, about as long as distance to * S. rectangular oval outline of
hisfcbr and mod broad concen. occas sparkle nr center. BS, 3Jul1989,
25cm - 1'.5x1' in pa165. br core w/*ings but no *ar nuc. rectangular.
30cm - easy @ 149x. m12.5 * 1'.5 SW. 238x: 2'x1' in pa160. nicely concen with
0'.8 circ core. perhaps sub*ar nuc.
- 2' E of m12.5 *. 149x: 1'.5x0'.8 in pa0. 238x: core elong in pa150,
0'.8x0'.5. fairly concen w/occas non *ar nuc. m13.5 * 1'.4 S.
The Messier objects
The Bennett objects
The Caldwell list
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