Francis Leavenworth discovered NGC 1258 = LM 2-364 on 19 Nov 1886 with the 26" refractor at Leander McCormick Observatory, recording "mag 15.6, 1.2' dia, vlE 0?, GC 665 [NGC 1256] 12' south." His position is just 0.2 min of RA east of ESO 547-024 = PGC 12034 and this galaxy is 13' N of[NGC 1256.

400/500mm - 17.5" (11/10/96): faint, moderately large, elongated 3:2 SSW-NNE, low even surface brightness. Appears ~1.5'x1.0' (slightly larger than listed dimensions). In field with NGC 1256 13' SSW.

Notes by Steve Gottlieb