NGC 3610 is the brightest member of a 5 member group (LGG 234), along with NGC 3610, 3619, 3642, 3674 and 3683.

William Herschel discovered NGC 3610 = H I-270 = h847 on 8 Apr 1793 (sweep 1038) and noted "vB, cL." JH made 3 observations, on sweep 344 logging "B; R; vsvmbM to a * 11m." His position is accurate.

400/500mm - 17.5" (3/19/88): bright, small, slightly elongated NW-SE. Sharp concentration with a very small bright core and a faint halo! About 15' NNW is a small group of 7 stars including mag 9.0 SAO 27978.

Notes by Steve Gottlieb