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Type: galaxy (AGN), S0a
Mag: B=12, V=?
Size: 3.019′ x 2.511′
Synonyms: H II-182
Discovered in 1784 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "pF, pL, E, r."
The RNGC (Sulentic and Tifft 1973) notes that this is a 12.0 mag galaxy. Their coded description reads BBARLIKE OBJ,DIFHALO SSTR SUSP.
G. de Vaucouleurs ("Galaxies and the Universe", Chapter 14 - Nearby Groups of Galaxies) notes that the five brightest members of the Virgo V group, a part of the Virgo II cloud complex, are NGC 4546, NGC 4691, NGC 4487, NGC 4593 & NGC 4504.
This galaxy appears on page 44 of "The Hubble Atlas of Galaxies" by Allan Sandage (1961, Washington, DC).
Photo Index by Jim Lucyk: Hubble Atl.of Gal. (Sandage 1961) p44.
Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "11.8M; 2' x 1.5' extent; fairly bright ellipse with much brighter center; !good supernova prospect! see photo at HAG-44;30' S and a bit E is SP GAL N4684 (12.6M; 2'x 1' extent), a NNE-SSW-oriented soft, small slash with a 14M star 20" N of core."
Observing site: Little Bennett Regional Park
[12h 48m 12s, -3° 20' 0"] A small, almost edge on spiral. B: SBa.
The Messier objects
The Bennett objects
The Caldwell list
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