James Dunlop probably discovered NGC 1943 = D 91 = h2850 on 24 Sep 1826 with his 9" reflector at Parramatta and described "a small round nebula, 12" or 15" diameter." His position is 13' SE of the cluster. Dunlop's D 90, described as "a small round faint nebula, north of a small star", may be another observation of this cluster. His position for D 90 is just 5' NE of the cluster.

JH independently discovered the cluster in Dec 1834 and recorded "pB; R; glbM; 50"." On a later sweep he wrote "vF; 40"; has a *15m at 60" dist, pos = 19.6?." His position (recorded on 3 sweeps) is accurate.

600/800mm - 30" (10/15/15 - OzSky): fairly bright, moderately large, round, thin halo, 0.8' diameter, quite mottled but not resolved in poor seeing. A mag 14 star is just off the NNE edge, 0.6' from center. I didn't use the NPD filter, but the red DSS shows some nebulosity is involved (LHA 120-N130). NGC 1938 and 1939, a very close pair of clusters, lies 14' NNW.

Notes by Steve Gottlieb