William Herschel discovered NGC 5336 = H II-670 = h1690 on 9 Apr 1787 (sweep 725) and noted "pB, pL." JH made the single observation "vF; R; psbM; 30"." and measured an accurate position.

400/500mm - 17.5" (6/5/99): fairly faint, fairly small, 1.0' diameter. No concentration but there appeared to a slight brightening on the SW edge. Located ~3' W of a two mag 11 stars and a third mag 13.5 star.

Notes by Steve Gottlieb