Lewis Swift discovered IC 3370 = Sw. XI-139 on 30 Jan 1898 and logged "pB; pL; R; 7m * with distant companion near p[receding]." Howe reobserved the galaxy in 1900 and reported "I see no "7m * nr p", but found one of mag 8.5, which precedes 15 seconds, 1.5' south." Howe measured an accurate micrometric position that was used in the IC 2.

400/500mm - 18" (3/28/09): fairly bright, moderately large, elongated 4:3 SW-NE. Appeared unusually bright for an IC galaxy that was missed by John Herschel. Located 28' NW of mag 7.8 HD 108684 and 36' NE of NGC 4373 in a subgroup on the NW side of the Centaurus Cluster (AGC 3526).

Notes by Steve Gottlieb