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RA: 12h 42m 50s
Dec: +02° 41′ 16.5″
Ch: MSA:772, U2:239, SA:14
Ref: SIMBAD, NGC/IC
Type: galaxy (AGN LINER-type), E
Mag: B=10.6, V=9.7
Size: 6.456′ x 4.897′
NGC 4636 is not NGC 4624, which see.
Synonyms: H II-038
Discovered in 1784 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "pB pL iF r."
This galaxy is a member of the Virgo Cluster.
A supernova erupted in this galaxy in 1939 (12.4p)
The RNGC (Sulentic and Tifft 1973) notes that this is a 11.0 mag galaxy. Their coded description reads E,R,BM,EXTDIF HALO.
G. de Vaucouleurs ("Galaxies and the Universe", Chapter 14 - Nearby Groups of Galaxies) notes that the five brightest members of the Virgo X group, a part of the Virgo II cloud complex, are NGC 4303, NGC 4636, NGC 4536, NGC 4517 & NGC 4643.
This galaxy appears on page 1 of "The Hubble Atlas of Galaxies" by Allan Sandage (1961, Washington, DC).
Photo Index by Jim Lucyk: Hubble Atl.of Gal. (Sandage 1961) p1.
Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "10.8M; 3' diameter; bright, round spot with much brighter center; !good supernova prospect! see photo at HAG-1."
Steve Coe, observing with a 13" f/5.6, notes: "Bright, pretty large, irregularly round, high surface brightness, much, much brighter middle with a very bright nucleus at 165X."
Observing site: Little Bennett Regional Park
[12h 42m 48s, 2° 41m 0s] A bright elliptical. (E1, Burnham)
The Messier objects
The Bennett objects
The Caldwell list
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