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Mag: B=?, V=?
Size: 0.316′ x 0.186′
NGC 6151 is an asterism of 8-10 faint stars at JH's position. It is positively identified by his comment that it "... is pointed to by 2 small stars 9m and 14m; the *9m is the only one of that magnitude within 6 arcmin." ESO mistakenly chose a very faint galaxy well east of JH's position, which is not only very good, but was copied correctly into the NGC.
Discovered by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "vF and S; is pointed to by 2 small stars 9th mag and 14th mag; the star 9th mag is the only one of that magnitude within 6'."
Bailey, examining a Bruce plate (Harvard Annals, Vol 72, No 2), describes it as "not seen; multiple star near this position."
The RNGC (Sulentic and Tifft 1973) notes that this is a unverified southern object.
The Messier objects
The Bennett objects
The Caldwell list
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