Albert Marth discovered NGC 6710 = m 391 = St II-24 on 3 Aug 1864 and noted "vF, S, R, bM." Édouard Stephan independently rediscovered this galaxy on 18 Jul 1871. His accurate micrometric position is accurate. Both are credited in the NGC, though Dreyer referenced Stephan's first list, instead of list II.

300/350mm - 13.1" (7/20/85): fairly faint, broad concentration, elongated SW-NE, possible faint stellar nucleus. A mag 11 star is 1.6' SSE of center. Located 26' NNE of ∑2406 = 6.9/10.9 at 5" in a rich star field.

Notes by Steve Gottlieb