Forms a pair with PGC 3099254 4.2' SE. The companion appeared faint to fairly faint, very small, round, 12" diameter, low even surface brightness.

DeLisle Stewart discovered IC 4764 = DS 518 on an Arequipa plate taken on 16 Sept 1901. He noted "eF, eS, vE at 15°, susp."

600/800mm - 30" (10/12/15 - OzSky): at 303x and 394; fairly faint, moderately large very elongated 7:2 SSW-NNE, 0.8'x0.25', weak concentration. A collinear string of 3 mag 14-15 stars extends to the south-southwest. Located between mag 9.3 HD 173268 6' SW and mag 10.0 SAO 245730 8' E. Also another mag 9.6 star lies 9' to the east.

Notes by Steve Gottlieb