E.E. Barnard and Sherburne Burnham discovered IC 921 in a group around June 1892 with the 36" Lick refractor. Harold Corwin and Wolfgang Steinicke identify IC 921 with LEDA 2509643, situated 1' S of Barnard's position. There are no other nearby candidates in the cluster, so this identification is very reasonable though not certain due to several poor positions in the group. Edwin Hubble studied this group in his 1917 PhD thesis "Photographic Investigations of Faint Nebulae" (published in 1920). He noted this galaxy (listed as #41) was "very probably" IC 921 and based on plates taken with the Mt. Wilson 60-inch in 1919, Pease described it as "MB, 8"x4", p.a. 135°, lbM." See IC 917 for more.

900/1200mm - 48" (5 /9/18): fairly faint, small, round, 12" diameter, even surface brightness. This member of AGC 1783 is situated 2.6' WNW of mag 9.9 HD 238276.

Notes by Steve Gottlieb