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Type: galaxy (AGN LINER-type), E...
Mag: B=9.6, V=?
Size: 5.128′ x 4.677′
Synonyms: H I-017
Houston writes: "About three quarters of a degree north-northeast of M96 is M105, a featureless elliptical galaxy about magnitude 10.5 and 2' across. M105 forms a small triangle about 8' on a side with two galaxies east of it, NGC 3384 and NGC 3389."
Doig, P. (1925) Notes on the nebulae and clusters in Webb's 'Celestial Objects for Common Telescopes' (Sixth edition, Vol.ii). Part II. M.N.R.A.S., 35(8), 280.
(Sulentic and Tifft 1973) notes that this is a 11.0 mag galaxy. Their coded description reads BE,R,BM.
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 Leo Group. Members include NGC 3338, NGC 3351, NGC 3368, NGC 3377, NGC 3379, NGC 3384, NGC 3389, NGC 3412, NGC 3489, NGC 3593, NGC 3596, NGC 3605, NGC 3607, NGC 3608, NGC 3623, NGC 3626, NGC 3627, NGC 3628, NGC 3686 & NGC 3810.
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.
This is the major condensation in the Leo I cloud; it is centred on a dense core (3°x1.5°) including NGC 3351 (M95), NGC 3368 (M96), 3377 3377A 3379 3384 and NGC 3412.
A new globular cluster black hole in NGC 4472. arXiv:1008.2896v1
The authors note that a globular cluster around this galaxy hosts a black hole.
Lorenzin, in the electronic version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "10M; 4' diameter; bright, large and round with much brighter center; makes isoceles triangle with N3384 (11M; 4' x 2' extent) soft, slashy glow with axis oriented ENE-WSW 7' to ENE and N3389 (12.2M; 2' x 1' extent) softer oblong 10' to ESE; all three in 15'-diameter field; reference: VADSS-105; all three are !good supernova prospects!."
, in "SACNEWS On-Line for April 1996", using a 12.5" f/6, notes: NGC 3379 (M 105) is bright, large, elongated and has a much brighter, almost stellar, core in the 12.5" f/6 at 120X. It has two companions
:"An elliptical galaxy, this object is relatively bright and appears round, about 3' in diameter, and has a bright central core."
7x35mm - fairly f, vsm. BS, 29Apr1992, TSP.
7cm - sl fntr than M96, sl oval @ 30x. 50x: vconsp sub*ar nuc in hisfcbr glow. nuc is most consp of grp. halo points to N3389. BS, 12Apr1992, Anderson Mesa.
12-inch f5 (EP: 26mm SW, 20mm UW, 7mm UW)
Conditions: The most clear sky possible. Dark moon and stars magnitude 6 and fainter are visible with the naked eye. Excellent clean sky, limited star flickering and brilliant objects. Limiting Magnitude: 6.2.
Elliptical Galaxy located in Leo. Bright, well defined. Fairly low surface brightness. This galaxy has an oval shape which almost looks like a flatsomed rugby ball. The central structure of this galaxy is very bright. There a few faint 4th and 5th magnitude stars. There are slight darker regions on the outskirts of this galaxy.
Observing site: Pinnacles overlook
[10h 47m 48s, 12° 35m 0s] M105 is a lackluster elliptical, but makes a grand view with both NGC 3384 and NGC 3389 in the same field.
The Messier objects
The Bennett objects
The Caldwell list
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