7239 7236
Peg
☀13.6mag
Ø 36''

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Albert Marth discovered NGC 7237 = m 469, along with NGC 7236, on 25 Aug 1864 and noted "vF, S, stellar." Dreyer questioned if this object was possibly only a faint star while an assistant at Birr Castle on 29 Oct 1877.

400/500mm - 17.5" (8/20/88): fainter member of a double system with NGC 7236 35" NW of center. Very faint, extremely small, round. In a common halo with NGC 7236. NGC 7237C, an extremely faint anonymous galaxy, is also just 38" SE! This galaxy appeared extremely faint and small, round, at visual threshold. Located 2.8' NE of a mag 10 star.

600/800mm - 24" (9/27/14): At 375x; faint, very small, round, fairly low even surface brightness, 18" diameter. NGC 7237 is the middle of three collinear galaxies (and second brightest) in the compact Arp 169 triplet with slightly brighter NGC 7236 0.6' NW and very compact NGC 7237C 0.6' SE. NGC 7237C appeared very faint, extremely small, round, ~5" diameter (core), not difficult with averted. Arp 169 forms a very similar triplet as Arp 170 (also in Pegasus).

Notes by Steve Gottlieb