Royal H. Frost discovered IC 4507 = F. 1136 on a plate taken 13 May 1904 at Harvard's Arequipa station. He noted "vF, R, 0.1' dia." Dreyer made a typo in the IC 2, equating IC 4507 with F. 1336.

400/500mm - 17.5" (7/16/01): extremely faint and small, round, 15" diameter, requires averted to glimpse. Located 1' E of a mag 10.5 star and at the midpoint of NGC 5760 2.9' N and a mag 13 star a similar distance south.

Notes by Steve Gottlieb