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Type: galaxy, Sc
Mag: B=13.1, V=?
Size: 3.311′ x 1′
Synonyms: H II-582
Discovered in 1786 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "F, mE, resolvable, 2' long, 0.25' broad; following a star 6th mag,16 seconds in time."
The RNGC (Sulentic and Tifft 1973) notes that this is a 13.0 mag galaxy. Their coded description reads ALMEON,BM,EQDKLN B* 2'SP.
Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "12.5M; 3.5' x 1.2' extent; very soft slash; axis oriented NNW-SSE; 14M star embedded in SSE end; 4' E of 6.4M DBL ST ADS 9323 (1.6" separation @ PA 139; 6.6-10.6M); proximity of DBL ST hampers visibility of N5690."
Steve Coe, observing with a 13" f/5.6, notes: "pretty bright, pretty large, somewhat brighter middle, much elongated 3X1. 13th mag star in south end."
The Messier objects
The Bennett objects
The Caldwell list
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