Ser
☀15.8mag
Ø 84'' / 36''

400/500mm - 17.5" HCG 77A and B appear as an extremely faint, elongated glow measuring 30"x15" in a N-S orientation. A mag 15 star is 1' SE and a slightly fainter star 1.3' E. For moments only, resolved into two components (77A and 77B have a total length of 0.5') although extremely difficult to view these simultaneously.

900/1200mm - 48" (4/6/13): UGC 10049 = HCG 77 is a very small quartet, 1.4'x0.6', oriented N-S. At 488x, HCG 77A appeared moderately bright, small, round, 18" diameter, high surface brightness. HCG 77B, just 15" N, was cleanly resolved at 375x and well split at 488x. HCG 77B appeared fairly faint to moderately bright, very small, slightly elongated SW-NE, 15"x10", high surface brightness. HCG 77C/D lies 25" N. HCG 77C appeared fairly faint, fairly small, slightly elongated NW-SE, ~28"x22", even surface brightness except for a faint knot at the south edge (HCG 77D). HCG 77D appeared very faint, very small, round, 8" diameter. On the SDSS, this object is resolved into two very compact blue knots, which appear to be HII regions at the south edge of HCG 77C.