Heinrich d'Arrest discovered NGC 2797, along with NGC 2794 and an independent discovery of NGC 2795, on 15 Mar 1866. His single position is 5 seconds of time west of UGC 4891. The noted the nebula formed a quadrilateral with 3 mag 16 stars (the stars are several mags brighter).

400/500mm - 17.5" (1/28/89): faint, very small, round, even surface brightness. Forms the east vertex of an isosceles triangle with a pair of mag 12 stars 3' WSW and 3' WNW. Forms a pair with NGC 2795 6' SSW in a group.

Notes by Steve Gottlieb