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RA: 23h 44m 15.86s
Dec: +10° 46′ 0.9″
Ch: MSA:1231, U2:170, SA:17
Type: galaxy (in pair), S0:
Mag: B=12.5, V=?
Size: 1.778′ x 1.698′
Synonyms: H II-255
Discovered in 1784 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "pB, pS, R, gbM, r."
The RNGC (Sulentic and Tifft 1973) notes that this is a 13.0 mag galaxy. Their coded description reads E,R,BM,HISB.
Steve Coe, using a 13.1" f/5.6, notes: "NGC 7742 Pretty bright, pretty small, round, pretty suddenly brighter in the middle with an almost stellar nucleus at 135X. There is a 12th magnitude star on the eastern side."
POSS: m12.5 * at 1'.18 in pa115.
NGC: m12 * 72" E.
15cm - roundish, 1' diam. f * to the E. some cen brtning.
- distinctly brtr than -43, also m12.5 * 1' away in pa120. 1' diam---maybe sl lgr than distance to *---circ, mod-strong even concen, no distinct core or nuc. modhisfcbr. BS, 29Sep1989, Anderson Mesa.
25cm - 50' N of -43. round, 1' diam. star E is m11, 1' from center. broad core fluctuates w/seeing. fairly f halo.
30cm - nicely round, just 1'.2 W of m11.5 *. med concen w/*ar nuc.
The Messier objects
The Bennett objects
The Caldwell list
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