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RA: 14h 05m 1.45s
Dec: +53° 39′ 44.6″
Con: Ursa Major
Ch: MSA:570, U2:49, SA:2
Type: galaxy, Sc:
Mag: B=11.9, V=?
Size: 6.165′ x 5.128′
Synonyms: H I-214
Discovered in 1788 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "cB, cL, north end abruptly, south very gradually." In the Philosophical Transactions, 1811, Herschel adds: "It terminates abruptly to the north and is diffused to the south."
Schmidt K.-H., Priebe A. & Boller T. (1993) Nearby galaxies. Revised machine-readable version of the catalogue. Astron. Nachr., 314, 371. [1993AN....314..371S]
Other names: "U9013,VV344". Inclination: (face-on, in degrees) 17 Total photoelectric blue mag 11.28 Total colour index .49 Logarithm of the angular diameter D25 (arcminutes) 1.68 Blue photographic magnitude 11.41 This galaxy is included in a sample of galaxies with velocity less than 500km/s with respect to the centroid of the Local Group. [Nearby Galaxies. Schmidt K.-H., Priebe A., Boller T. (Astron. Nachr. 314, 371 (1993))]
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.
5. The nearer groups within 10 megaparsecs
G5. M101 (NGC 5457) Group. (may consist of 2 separate multiplets centred on M51 and M101.
Brightest members: 5457, 5194, 5055, 5195, 5585.
This is a traditional group, but its membership is somewhat uncertain. It is included by van den Bergh in his extended M94 group, but Holmberg and Sersic make it a separate group. … The major members, then, are M101 (NGC 5457) and its satellites NGC 5204, NGC 5474, NGC 5585 and the wide pair formed by M51 (NGC 5194 and companion NGC 5195) and M63 (NGC 5055); a probable member is NGC 5949, and possibly some outlying systems including NGC 4605, NGC 5907, NGC 6503, A1353 (Ho IV) and A1339 (Ho V). Many dwarfs are concentrated in the region … Except for NGC 5195 (type I0) all bright members of the group are spirals of type later than Sb and dwarf Magellanic irregulars … the overall dimensions of the group are 23° x 16°, and agan there is no central condensation.
(Sulentic and Tifft 1973) notes that this is a 11.5 mag galaxy. Their coded description reads R,VDIF,KNY, B KN OR NUC N EDGE.
Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "11.5M; 4' x 3' extent; fairly difficult oblong with little brighter center; 14M star within 30" of core; 12.5M star 4' NW of core; near M-101 !good supernova prospect!."
Observing site: Little Tycho Observatory
[14h 5m 0s, 53° 40m 0s] A large, faint smudge, visible only when the telescope is moved.
The Messier objects
The Bennett objects
The Caldwell list
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