Édouard Stephan discovered NGC 2406 = St XIII-30 on 7 Feb 1885 (along with NGC 2407 = St XIII-31) with the 31" silvered-glass reflector at the Marseille Observatory. His position matches CGCG 086-041.

400/500mm - 17.5" (1/31/87): very faint, small, round, faint core, slightly smaller and fainter than NGC 2407 3.4' NNE.

Notes by Steve Gottlieb