John Herschel discovered NGC 4806 = h3440 on 30 Mar 1835 and recorded "F; R; gvlbM; 40"." His position is accurate.
400/500mm - 18" (5/16/09): faint, diffuse glow, moderately large, irregularly round, 45"x40". A kite-shaped asterism of 4 stars (one is a double) is close SW.
Notes by Steve Gottlieb