Herbert Howe discovered IC 2151 = Ho. III-17 on 22 Jan 1900 while observing IC 438 and logged "eF, pS; near [IC] 438." His micrometric position is accurate.

400/500mm - 17.5" (3/8/97): faint, fairly small, elongated 4:3 SW-NE, low even surface brightness. Forms a pair with brighter IC 438 7.7' SE. Located just west of a line drawn through a 1' pair of mag 10-11 stars 5'-6' SSE.

Notes by Steve Gottlieb