John Herschel discovered NGC 1833 = h2765 on 12 Nov 1836 and recorded "vF; pL; runs into and forms the first mass of a series of clustering groups." His position is accurate. Located within stellar association LH 24.

600/800mm - 25" (10/10/15 - OzSky): at 318x; fairly large nebulous patch 1.5' diameter with a mag 13.4 star near the center and a half-dozen additional stars resolved. The nebulosity had a fair response using the NPB filter with a brighter piece on the northeast side and a 2' irregular shape. Located at the south end of the huge NGC 1845 association/star cloud (LH 26) and many brighter stars over a rich, glowing background extend a full 20' NNE! Mag 9.5 HD 269028 lies 3.2' NNW. NGC 1837 lies 3' ENE.

Notes by Steve Gottlieb