Stephane Javelle discovered IC 1691 = J. 3-874 on 2 Dec 1899 and recorded "pF, nearly round, 20", no concentration." His position is 2' too far south, which appears to be caused by a error in declination offset from his comparison star (same problem with IC 1684).

600/800mm - 24" (10/4/13): extremely to very faint, very small, round, 12" diameter. Located 4.0' WSW of NGC 517 and 4.8' SW of NGC 515 on the eastern side of the NGC 507 Group.

Notes by Steve Gottlieb