John Herschel discovered NGC 1136 = h2499 on 5 Dec 1834 and logged "F; R; gb; - moon up." There is nothing at his position but 5.4' N is ESO 154-019 = PGC 10807. This galaxy was probably also later recorded by Herschel as h2498 (closer to ESO 154-019), and it received the designation NGC 1135. He assumed they were different objects, because of the apparent difference in positions. The RNGC uses Herschel's incorrect position. See Corwin's notes for NGC 1135.

Pietro Baracchi searched for GC 622 [NGC 1136] unsuccessfully on 11 Feb 1888 with the Great Melbourne Telescope. He reported "GC 622 is not to be found and probably there is some mistake in the position - according to his description 622 is no fainter than 621 NGC 1135], therefore I should see it."

600/800mm - 30" (11/4/10 - Coonabarabran, 429x): fairly bright, moderately large, slightly elongated E-W, ~1.5'x1.2'. Sharply concentrated with a fairly small (20") very bright core surrounded by a much fainter halo. Located 7' NW of mag 8.3 HD 18003. ESO 154-018 (misidentified as NGC 1135 in RNGC, ESO and PGC) lies 3' NNW.

Notes by Steve Gottlieb