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Type: galaxy (Seyfert 2), S0
Mag: B=11.3, V=?
Size: 3.548′ x 2.511′
PA: 10°
Synonyms: H I-173
Discovered in 1787 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "vB, R, vg nucleus in the middle, 2.5' diameter."
(Sulentic and Tifft 1973) notes that this is a 11.5 mag galaxy. Their coded description reads BE,SLEL,BM,HISB.
Doig, P. (1925) Notes on the nebulae and clusters in Webb's 'Celestial Objects for Common Telescopes' (Sixth edition, Vol.ii). Part V. M.N.R.A.S., 36(3), 89.
G. de Vaucouleurs ("Galaxies and the Universe", Chapter 14 - Nearby Groups of Galaxies) notes that the five brightest members of the Ursa Major I (Z) group are NGC 4151, NGC 3941, NGC 4145, NGC 4369 & NGC 3813.
Lorenzin, in the electronic version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "11.3M; 2' x 1' extent; small with stellar nucleus; looks like star with planetary nebula; !good supernova prospect!."
Observing site: Little Bennett Regional Park
Telescope: C-11
[11h 52m 54s, 36° 59m 0s] A bright, starlike nucleus, surrounded by a uniform, faint haze. Seyfert? Seyfert, as per Shi, et at, ApJ,J http://adsabs.harvard.edu/abs/2010ApJ...714..115S.
Lacaille's catalogue
The Messier objects
Dunlop's catalogue
The Bennett objects
The Caldwell list
Named DSOs
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