Édouard Stephan discovered NGC 6606 = St XIII-88 on 8 Aug 1883 and logged "vF, S, R, gbM, vf * center." His position is accurate.

400/500mm - 17.5" (8/1/89): fairly faint, fairly small, very elongated ~E-W, small very bright core, stellar nucleus, faint extensions.

600/800mm - 24" (9/5/18): at 375x; fairly faint, fairly small, slightly elongated, 45"x40", diffuse halo, broad concentration towards the center but no distinct nucleus. Located at the midpoint of mag 7.8 HD 167652 7' WNW and mag 9.5 SAO 47338 7' ESE.

UGC 11181, a challenging multiple interacting system, lies 10' ENE of NGC 6606. Three components (PGC 61650, 61649 and 200356) within 1.8' were seen at 375x, though all were extremely faint and only between 6" and 15" in diameter.

Notes by Steve Gottlieb