Francis Leavenworth discovered NGC 3133 = LM 2-419 in 1886. He noted "mag 16.2, 0.2' dia, R." There is nothing at his position but 1 min 18 sec of RA west is PGC 29417. Also, 45 sec of RA east and 2' north is NGC 3138. But this is the next entry in the LM II list and may have been found the same night.

400/500mm - 18" (4/10/04): extremely faint, small, 0.4'x0.3'. Visible less than 50% of the time with averted vision so orientation difficult to determine but I was certain of the sighting. Located 5' NE of a mag 10.4 star.

Notes by Steve Gottlieb