sponsored by psychohistorian.org
RA: 23h 01m 0.05s
Dec: +30° 08′ 43.4″
Ch: MSA:1163, U2:124, SA:9
Type: galaxy, S0
Mag: B=11.04, V=11.87
Size: 3.981′ x 2.344′
Synonyms: H II-212
Discovered in 1784 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "pB, pL, lE, mbM, r, south of 2 faint stars."
Photo Index by Jim Lucyk: Sky&Tel. 5/81 p380, Hubble Atl.of Gal. (Sandage 1961) p4.
The RNGC (Sulentic and Tifft 1973) notes that this is a 12.0 mag galaxy. Their coded description reads E,EL,BM.
This galaxy appears on page 4 of "The Hubble Atlas of Galaxies" by Allan Sandage (1961, Washington, DC).
Steve Coe, using a 13.1" f/5.6, notes: "NGC 7457 Pretty faint, pretty large, elongated 2 X 1 and has a bright middle at 100X."
Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "11.5M; 4'x 2' extent; see photo at HAG-4."
POSS: m15 * 33" WNW: implies 15cm size 1'.1x0'.7.
L&deV: * WNW V=15.57/0.90.
15cm - mod br @ 80x. 140x: oval elong SE-NW, 1'.5x0'.8. mod even concen to nrly
circ core and sub*ar nuc. halo parallels wide pair of m13,13.5 *s S. m15
* @ threshold just outside halo WNW of center S of maj axis. *ry 50x fld.
BS, 12Jul1989, Anderson Mesa.
25cm - mod br. pa150, 1'x0'.3. core brtr w/nrly *ra nuc. loc 2' NNE of wide pair
30cm - nice, in pretty fld. found just W of 1'.5 triangle of *s. broadly
elliptical w/mod concen. 1'.3x0'.8 oval in pa120.
The Messier objects
The Bennett objects
The Caldwell list
DOCdb is still in beta-release.
Known issues, feature requests, and updates on bug fixes, are here:
Found a bug? Have a comment or suggestion to improve DOCdb? Please let us know!
DOCdb is a free online resource that exists to promote deep sky observing.
You could help by sharing your observations, writing an article, digitizing and proof-reading historical material, and more.
Everything on DOCdb.net is © 2004-2010 by Auke Slotegraaf, unless stated otherwise or if you can prove you have divine permission to use it. Before using material published here, please consult the Creative Commons Attribution-Non-Commercial-Share Alike 2.5 License. Some material on DOCdb is copyright the individual authors. If in doubt, don't reproduce. And that goes for having children, too. Please note that the recommended browser for DOCdb is Firefox 3.x. You may also get good results with K-Meleon. Good luck if you're using IE. A successful experience with other browsers, including Opera and Safari, may vary.