John Herschel discovered NGC 7636 = h3987 on 28 Sep 1834 and logged "eF; S; R; sbM; rather a doubtful object." Despite his uncertainty, his position accurately matches this galaxy.
400/500mm - 17.5" (10/13/90): very faint, very small, weak concentration, low surface brightness. NGC 7645 is 17.3' ESE.
Notes by Steve Gottlieb