Hermann Kobold discovered IC 4021 = K. 2-25 on 11 May 1896 with the 18-inch refractor at Strasbourg and recorded "* 14 in vF neb."
400/500mm - 17.5" (4/28/90): extremely faint and small, round. Located 4.1' NNE of NGC 4889 in the core of AGC 1656 and similar to IC 4026 1.6' ENE.
Notes by Steve Gottlieb