John Herschel discovered NGC 5756 = h3581 on 5 Jun 1836 and recorded "pB; pmE; gpmbM; 80"." His single position is at the east edge of the galaxy.
300/350mm - 13.1" (6/18/85): fairly faint, very elongated SW-NE, weakly concentrated halo, small bright nucleus with faint extensions.
Notes by Steve Gottlieb