William Herschel discovered NGC 2500 = H III-709 = h478 on 9 Mar 1788 (sweep 815) and recorded "vF, R, vgbM; about 2 1/2 minutes in diameter." A later observation says "I can perceive some of the stars." This is a mottled face-on spiral, so this created the impression of resolving some stars.

On 1 Feb 1851, Lord Rosse "saw stars in it and suspected at one time a curvilinear arrangement. On later observations spiral structure was suspected and sketches (by R.J. Mitchell and Samuel Hunter) reasonably capture the spiral structure, although they were not certain. In addition a couple of HII knots on the preceding side were apparently noticed.

300/350mm - 13.1" (2/23/85): moderately bright, fairly large, almost round, mottled, weak concentration. Situated midway between a mag 12 star 1.9' NE and a mag 10.5 star 1.7' SW of center.

Notes by Steve Gottlieb