DeLisle Stewart discovered IC 4790 = DS 532 on a plate taken in Sep 1900 from Harvard's Arequipa station. He noted "cB, S, R, bM."

600/800mm - 30" (10/14/15 - OzSky): at 303x; moderately bright and large, elongated 3:2 SW-NE, 45"x30". Broad concentration with a bulging, brighter core. An extremely faint star or knot is at the southwest end. A mag 14.5 star lies 1' ENE and NGC 6684A lies 27' WNW.

Notes by Steve Gottlieb