Francis Leavenworth discovered NGC 1583 = LM 1-132 (along with NGC 1584 = I-133) on 17 Oct 1885 with the 26" refractor at the Leander McCormick Observatory. His rough position (nearest minute of RA) is 0.6 tmin east of ESO 551-008 = PGC 15193. Herbert Howe measured an accurate position in 1899-00 using the 20" refractor at Chamberlin Observatory (repeated in the IC 2 notes).

400/500mm - 17.5" (11/10/96): slightly brighter of a similar pair with NGC 1584 located 5.0' NNW. Faint, small, round, 40" diameter.

Notes by Steve Gottlieb