Édouard Stephan discovered NGC 912 = St X-8 on 30 Oct 1878 with the 31" reflector at the Marseille Observatory and noted "F, vS, R, bM". His position matches CGCG 539-020. Except for NGC 898 and NGC 923 (discovered by WH), Stephan discovered all other NGC galaxies in the cluster on the same night.

300/350mm - 13.1" (10/20/84): extremely faint and small, round. Forms a close pair with NGC 913 1.3' N. Located 4' ESE of NGC 910 in the core of AGC 347.

13.1" (11/13/82): extremely faint, very small, round.

600/800mm - 24" (11/23/19): at 375x; faint, fairly small, round, 24", gradually increases to the center. Located in the core of AGC 347 with NGC 913 1.4' N and brighter NGC 910 4' NW.

Notes by Steve Gottlieb