S-L 158 appeared as a bright, compact knot (cluster), round, 20" diameter, with a surprisingly high surface brightness. LMC-N186, an incomplete, faint annulus of nebulosity (Superbubble) passes through NGC 1791, but I didn't examine the region with a filter to look for nebulous haze.

John Herschel discovered NGC 1791 = h2734 on 16 Dec 1835 and recorded "eF, R; 25"." His single position is very accurate.

600/800mm - 30" (11/6/10 - Coonabarabran, 264x): fairly bright cluster, irregular, ~1' diameter, several mag 14-15 stars are resolved in the core and one on the northwest end. The cluster is situated in the center of an equilateral triangle consisting of mag 8.7 HD 32571 5' WNW, mag 10 HD 268923 5' NE and S-L 158 5.4' S. HD 32763, a mag 11.5 red supergiant (binary), is 2' SE.

Notes by Steve Gottlieb