William Herschel discovered NGC 2236 = H VII-5 = h390 on 23 Feb 1784 (sweep 156) and described "a cluster of compressed stars of various magnitudes, pretty rich in small stars; the preceding part contains chiefly large onces, not round." On 8 Jan 1828 (sweep 118) John Herschel described an "Irreg fig cl like a hollow triangle in a crowded part of the Milky Way; stars vS; 12...15m; one star 10m. The surrounding loose stars are all large."

300/350mm - 13.1" (1/18/85): two dozen faint stars in a 5' region over background haze. The brighter stars are in a rich 1' triangular outline with the brightest mag 11 star in the cluster. A long curving arc of fainter stars emanates from the group. Fairly striking cluster.

Notes by Steve Gottlieb