Hermann Kobold discovered IC 4026 = K. 2-26 on 11 May 1896 with the 18-inch refractor at Strasbourg and recorded "* 14 in vF neb."
400/500mm - 17.5" (4/28/90): located in the core of AGC 1656 and form a pair with IC 4021 1.6' WSW. Extremely faint and small, round, 15" diameter, even surface brightness.
Notes by Steve Gottlieb