Isaac Roberts discovered IC 3583 on a photograph taken 29 Apr 1892 with a 20" reflector at his Starfield observatory in Crowborough, Sussex. He described "a streak of nebulosity extending in north preceding direction from a 13th mag star; two 12th mag stars near, and the faint comes of the one on the north following side seems to touch the nebulosity." Frost also catalogued it based on a plate taken 10 May 1904 at Harvard's Arequipa station. He noted "Elliptical, 1.1' x 0.2' at 185°, a 13 mag * f[ollows] 2 or 3 s[econds]."

600/800mm - 24" (6/4/16): at 322x; faint, fairly small, roughly oval 5:3 N-S, low even surface brightness, diffuse appearance with no structure. A mag 13 star is at the southeast edge and a mag 11 star is 1' NE of the geometric center. Located 6' NNW of M90. This irregular galaxy is interacting with M90 (forming Arp 76), and apparently disturbing the outer arm on the northeast side, which appears somewhat stretched towards IC 3583.

Notes by Steve Gottlieb