Herbert Howe discovered IC 2377 = Ho I-10, along with IC 2375 and 2379, on 22 Feb 1898 with the 20" refractor at the Chamberlin Observatory in Denver. He noted "eF, vS, 2nd of 3" and his micrometric position matches MCG -02-22-015 = PGC 23683. The identifications of IC 2377 and IC 2379 are reversed in PGC but correct in MCG.

400/500mm - 17.5" (2/8/97): second and faintest in a trio with IC 2375 and IC 2379. Extremely faint, small, round, very low even surface brightness, 30" diameter. IC 2379 is just 0.9' NNE and IC 2375 1.6' W. A mag 11 star lies 1.5' ESE.

600/800mm - 24" (2/16/15): at 322x; faint to fairly faint, fairly small, slightly elongated, 0.4'x0.3', even surface brightness. Faintest (lowest overall surface brightness) in a close trio with IC 2375 1.6' W and IC 2379 0.9' NNE. A mag 11 star is 1.6' ESE

Notes by Steve Gottlieb