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RA: 23h 00m 3.76s
Dec: +15° 58′ 48.2″
Ch: MSA:1209, U2:213, SA:17
Type: galaxies (interacting), Sc
Mag: B=12, V=?
Size: 2.57′ x 1.096′
Synonyms: H II-251
Discovered in 1784 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "pB, cL, E, r."
The RNGC (Sulentic and Tifft 1973) notes that this is a 12.5 mag galaxy. Their coded description reads EL,HISB,INT KNOTS.
A supernova erupted in this galaxy in 1980 (13.5p)
Listed as No. 13 in Arp's "Atlas of Peculiar Galaxies" (Astrophysical Journal Supplement, vol. 14, 1966.) He remarks that it is of "high surface brightness."
Observer: Michael Geldorp Your skills: Intermediate (some years) Date/time of observation: 11/11/1999 20.00 UT Location of site: Alphen ad Rijn, Netherlands (Lat 52*N, Elev ) Site classification: Suburban Sky darkness: 4.5 Limiting magnitude Seeing: II I-V Seeing Scale (I best) Moon presence: None - moon not in sky Instrument: 8" f/6 Dobsonian Magnification: 49X, 98X, 203X, 244X Filter(s): Object(s): NGC 7448 Category: External galaxy. Class: Sc Constellation: Peg Data: mag 11.7 size 2'.7 x 1'.3 Position: RA 23:00 DEC +15:59
Description: In my search for faintish galaxies in the fall sky more searches came up empty than not.
NGC 7448 was found as an extremely faint smudge of light, not seen at 98X and just at 203X. Smooth and round with no real brightning inwards. Brightest of group but the only one spotted.
Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "11.8M; 2' x 1' extent; bright, N-S-oriented oblong with 13M or dimmer stellar core; 12M star 5' due E; 80' NW of 2.5M Markab (Alpha PEG), the SW-most corner of the Great Square; may as well try for very, very faint EL GAL N7454 (13.6M; 1' diameter) 30' to NNE of N7448 just E of a 9.5M star."
Steve Coe, using a 13.1" f/5.6, notes: "NGC 7448 Pretty bright, pretty large, elongated 2 X 1 and has a bright middle at 135X."
Listed by the Herschel Club, described as "elongated, use averted vision since it is very difficult to view it directly. Situated near a couple of bright field stars. 8-inch, 43x."
= Arp 13
POSS: m11.5 * 4'.16 WNW; m10-10.5 * 2'.44 E/sl S. pair 2'.2 NW: 13.5,13.5;
16"; 280; third comp m15.5.
8cm - 20x: sub*ar spot w/consp *ar nuc. m9 * 10' NE. BS, 4Oct1983, Anderson
15cm - vdifficult. no impressions of shape, and sfc intensity not discernable
due to seeing. more difficult than N7332 though rated brtr.
- mod br @ 50x in *ry fld. 140x: pa165-170, 3'x1', or sep of gx and m11.5 *
WNW; def longer than distance to m10 * ESE. tapered oval w/mod even
concen. core not well-def, occas *ar nuc. f pair NW halfway to br * WNW.
BS, 12Jul1989, Anderson Mesa.
25cm - fairly good size though sfcbr mod low. even concen, no features. 1'.5x1'
30cm - fairly br, broad core. 2'x1' elong in pa150. f pair 1'.5 SW, the Ern *
brtr. an even glow.
The Messier objects
The Bennett objects
The Caldwell list
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