Édouard Stephan discovered NGC 5790 = St XIII-81 on 16 May 1884. His position is accurate.
400/500mm - 17.5" (6/18/93): faint, small, round, 30" diameter, fairly low even surface brightness except for very small brighter core. The pretty double star h2756 = 9.1/10.1 at 25" is just 3' ESE.
Notes by Steve Gottlieb