Frank Muller discovered NGC 2583 = LM 2-402 in 1886 with the 26" refractor at the Leander McCormick Observatory and recorded "mag 13.5, 0.4' dia, R, sbMN, 1st of 4 [with NGC 2584, 2585, 2586]." There is nothing at his position, but 1.0 min of RA west is MCG -01-22-008 = PGC 23516. Kobold measured an accurate position at Strasbourg in 1895. MCG doesn't label this galaxy NGC 2583.

400/500mm - 17.5" (1/12/02): faint, small, round, 40" diameter, bright core, crisp-edge to halo. A 20" pair of mag 14.5/15 star is just 1.5' W. First of three on a SW-NE line with NGC 2584 2.7' NE and NGC 2585 6.9' NE.

17.5" (4/6/91): very faint, very small, round, strong concentration with very small bright core, stellar nucleus. A faint mag 14/14 double star with separation 20" oriented N-S lies 1.5' W. First of three on a line with NGC 2584 2.5' NE and NGC 2585 7' NE.

600/800mm - 24" (2/16/15): fairly faint, small, round, 30" diameter, well concentration with a very small bright nucleus. Forms east vertex of a thin, isosceles triangle with two mag 14 stars 1.5' W [20" separation]. MCG -01-22-007 and -006 lie ~4' NNW.

Notes by Steve Gottlieb