Édouard Stephan discovered NGC 606 = St XII-16 on 18 Oct 1881 with the 31" reflector at the Marseille Observatory and logged "eF; R, diam = 45", very little central concentration, seems resolvable". His position is accurate.

400/500mm - 17.5" (11/30/91): faint, small, round, weak concentration. Located 2.5' S of mag 8.8 SAO 74804. A 30" pair of mag 12 stars is 3' W.

Notes by Steve Gottlieb