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Type: galaxy, Sab
Mag: B=12, V=?
Size: 2.691′ x 1.778′
Synonyms: H II-481
Discovered in 1785 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "pB, cL, R, 1.5' following a small star."
Observed by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "F, R, glbM, 35 arcseconds."
Burnham calls this a 12.9 mag spiral in Cetus, 1.3' x 1.2', "pretty faint, conciderably large, elongated, a little brighter in the middle. Lies 16.7' north-northwest from Chi Ceti. Has a thin dust lane across the equator, resembling Sombrero Galaxy NGC 4594 in Virgo."
The RNGC (Sulentic and Tifft 1973) notes that this is a 13.0 mag galaxy. Their coded description reads 4594EON,BM,EQDKLN.
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.
Includes NGC 584 and NGC 681 groups.
Brightest members: NGC 720 ( B(0) = 11.47), NGC 584 ( B(0) = 11.71), NGC 779 ( B(0) = 12.20), NGC 596 ( B(0) = 12.31), NGC 615 ( B(0) = 12.51).
Steve Coe, using a 13" f/5.6, notes: "Pretty faint, small, much bright middle, with 11 mag star on west side. I have noted this objects as round on one night and then elongated 2 X 1 on another."
POSS: Sombrero-style gx. "3"-shaped *ism to SW (see sketch on card). m12
* NW 44" at pa290. diamond + * (30cm descr) good. dk lane in p70.
Lick: 22' N is M-2-05-53.
15cm - just glimpsed.
- found in a "3"-shaped *ism w/gx Nmost in the config. mod difficult.
25cm - mod br in fld of f *s, m12 * on NW. halo 1' diam, broad circ core. *ar
flash from nuc sometimes seen, perhaps due to nrby *s.
30cm - easy @ 149x. WNW 45" is m13.5 * in halo. SW is diamond of m13 *s 1'.5
on-a-side. btwn diamond & gx is m14.2 *. gx halo 45" core w/halo to 1'.
no nuc, irreg-br core of irreg shape.
The Messier objects
The Bennett objects
The Caldwell list
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