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Type: galaxy, Sa
Mag: B=12.81, V=?
Size: 2.344′ x 2.137′
NGC 718 is probably not also NGC 728, which see.
Synonyms: H II-270
Discovered in 1784 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "pB, S, iR, mbM."
An observer using the 72-inch f/8.8 speculum telescope at Birr Castle noted "vB nucleus."
The RNGC (Sulentic and Tifft 1973) notes that this is a 12.5 mag galaxy. Their coded description reads S,SLEL,HISB,FDIFARMS DKLNS P&F NUC.
This galaxy appears on page 11 of "The Hubble Atlas of Galaxies" by Allan Sandage (1961, Washington, DC).
Photo Index by Jim Lucyk: Hubble Atl.of Gal. (Sandage 1961) p11.
Tom Lorenzin, in the electronic version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "12M; 1'x 0.5' extent; NNW-SSE-oriented, oblong glow with much brighter, almost stellar nucleus; photo @ HAG-11; find N718 1 degree due N of 5M Xi PSC which is about 2 degrees WNW of 4M Alpha PSC."
Steve Coe, using a 13.1" f/5.6, notes: ""NGC 718 Pretty bright, pretty small, irregularly round, pretty suddenly much brighter middle at 135X."
The Messier objects
The Bennett objects
The Caldwell list
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