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Type: galaxy, Sc
Mag: B=10.4, V=?
Size: 7.943′ x 7.585′
NGC 3184. See NGC 3180.
Synonyms: H I-168
Three supernovae erupted in this galaxy; 1921 (10.7p), 1921 (11.0p), 1937 (13.2p)
by Jim Lucyk: Sky&Tel. 3/87 p347, Sky&Tel. 9/86 p249, Sky&Tel. 12/86 p583, Astronomy mag. 4/84 p78, Burnhams V3 p1961, Astronomy mag. 12/87 (inside cover).
(Sulentic and Tifft 1973) notes that this is a 11.0 mag galaxy. Their coded description reads SC,B,R,2WDKNARMS KNDIF HALO.
de Vaucouleurs, G. (1975) Nearby groups of galaxies. In: Kuiper, G. (ed) Stars and Stellar Systems. Volume 9: Galaxies and the Universe. Chapter 14, p557.
A few late-type spirals with fairly large diameters and consistent velocities stand out in Leo Minor in the foreground of more distant clouds ... [ see Table 4] cover an area 10°x5°. Two more (NGC 3344 and NGC 3510) 10° south of the group .. might be included as possible members."
Sandage, A. & Tammann, G. A. (1975) Steps toward the Hubble constant. V - The Hubble constant from nearby galaxies and the regularity of the local velocity field. ApJ, 196, 313-328. [1975ApJ...196..313S]
(1975, Astrophysical Journal, 196, 313-328) includes this galaxy in the NGC 3184 Group. Members include NGC 3184, NGC 3198, NGC 3319 & NGC 3432.
Houston notes that this galaxy appears brighter to him that its catalogued value of 12.1. He has been able to see it with a 5-inch Moonwatch scope. It has been described as very diffuse with an 11th mag star on its northern edge, as seen in a 6-inch. There is a red 7th mag star 10' to the west.
Lorenzin, in the electronic version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "10.5M; 5.5' diameter; soft glow with no center condensation; Mu UMA in same wide field to W; bright star 6' WNW of core is 7M SAO 43270; !good supernova prospect!."
Observing site: Pinnacles overlook
[10h 18m 18s, 41° 25m 0s] A large, face on Sc with a small, faint nucleus. (Burnham: Sc)
The Messier objects
The Bennett objects
The Caldwell list
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