Hermann Kobold discovered IC 4012 = K. 2-23 on 11 May 1896 with the 18-inch refractor at Strasbourg and recorded "* 14 in vF neb."
400/500mm - 18" (4/20/12): very faint, very small, round, 12" diameter. Located 6' due north of NGC 4889 in AGC 1656.
Notes by Steve Gottlieb