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RA: 22h 07m 52.61s
Dec: +31° 21′ 32.9″
Ch: MSA:1166, U2:122, SA:9
Type: galaxy (AGN LINER-type), Sab
Mag: B=11, V=?
Size: 3.63′ x 3.09′
Synonyms: H II-207
Discovered in 1784 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "cL, R, gmbM, easily resolved."
The NGC describes it as "bright, pretty large, gradually brighter towards the middle and easily resolvable."
The RNGC (Sulentic and Tifft 1973) notes that this is a 11.5 mag galaxy. Their coded description reads S,R,SBM,HISB, MUCH DIF PERIPH ARMS.
This galaxy appears on page 15 of "The Hubble Atlas of Galaxies" by Allan Sandage (1961, Washington, DC).
Photo Index by Jim Lucyk: Sky&Tel. 1/79 p107, Burnhams V3 p1393, Hubble Atl.of Gal. (Sandage 1961) p15, Rev.Shapley-Ames Cat.of Bright Gal. (Sandage,Tammann 1981) p123.
Houston notes that this galaxy "is a challenge for larger amateur scopes, because it is faint and only about 2' in diameter. In my 10-inch at 150x it appeared about mag 11.5."
Listed by the Herschel Club, described as "magnitude estimated at 11, a spiral 2.6' x 2.3', fuzzy round glow, brightening towards the centre. Situated in an area of dim stars through the eyepiece. 6-inch, 35x."
Steve Coe, using a 13.1" f/5.6, notes: "NGC 7217 Pretty bright, pretty large, elongated, very bright in the middle at 100X. On a good night it has a mottled halo surrounding the bright core."
Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "11.3M; 2.7' x 2.4' extent; small and a little oblong; stellar core; 12M star 5' ESE; 14.5M star N of core, within non-visual outer ring."
Observer: Todd Gross
Your skill: Intermediate
Date and UT of observation: 08/09/97 0700 GMT
Location & latitude: 22 miles west of Boston, Ma. 42.3N
Site classification: Suburban
Limiting magnitude (visual): 4.9 (estimated) 4.9(est) in vicinity of object
Seeing (1 to 10 - worst-best): 6
Moon up (phase?): No
Instrument: 16" Dob, 96%, 99% coatings
Bright, round and small, very bright starlike nucleus, looked very similar to a globular cluster, but with a more stellar center
POSS: m10.5-11 * 3'.2 ESE.
T&B: * ESE: V=10.5.
15cm - vbr @ 50x in *ry fld. 140x: sl oval, elong NE-SW, 1'.8x1'.5. minor axis reaches one-fourth the way to m11 * ESE. strong even concen to circ 30" core and *ar nuc. BS, 1Jul1989, Anderson Mesa.
25cm - br, found @ 47x. 180x: 2' diam and nrly round. perhaps in pa0 in core only. m10.5 * SSE. lg, mod f halo rises to sm nrly *ar nuc.
30cm - well concen, br. 149x: 2'.2 diam going to 1'.8 at 238x. smoothly concen w/brtr nuc < 10" across.
The Messier objects
The Bennett objects
The Caldwell list
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