DeLisle Stewart discovered IC 2538 = DS 328 on a plate taken 1 May 1900 at Harvard's Arequipa station. He noted "vF, vS, R, cbM."

400/500mm - 17.5" (4/1/00): extremely faint, very small, slightly elongated N-S, 0.4'x0.3'. Probably viewed brighter core region only. A mag 12.5 star lies 1' SW of center. Located 4' N of mag 8.3 SAO 201012.

Notes by Steve Gottlieb