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Type: galaxy (Seyfert 2), S...
Mag: B=12.84, V=11.96
Size: 2.63′ x 0.707′
Synonyms: H II-687
Discovered in 1787 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "pB, cL, mE 20 degrees sp-nf."
pF, pL, vmE 95deg, pBN, prob.spir.
Knox Shaw, H. (1915) Note on the nebulae and star clusters shown on the Franklin-Adams plates. M.N.R.A.S., 76(2), 105-107.
Comments on papers by Harding (MNRAS, 74(8)), and Melotte (MemRAS 60(5)) describing objects foundon the Franklin-Adams plates; compares with plates taken with the Reynolds reflector (Helwan Obs Bull. 9-15):
NGC 5507 is probably a mistake for NGC 5506, which is much elongated; NGC 5507 is round. [previously included in Class II-Spindle-shaped Nebulae]
, Astronomical Journal, Vol 66, p566) notes that this galaxy forms a pure pair with NGC 5507 3.9 arcminutes away.
(Sulentic and Tifft 1973) notes that this is a 13.5 mag galaxy. Their coded description reads EON,BM,SLDIF,EQDKLN.
The Messier objects
The Bennett objects
The Caldwell list
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