Royal Frost discovered IC 4689 = F. 1154 on a plate taken 1 Aug 1904 at Harvard's Arequipa Station. He noted "bM, magn 14".

600/800mm - 25" (10/15/17 - OzSky): at 397x; fairly faint, fairly small, elongated 2:1 NW-SE, ~30"x15", contains a very small bright elongated core. A mag 13.4 star is 30" NE. IC 4689 is the southernmost of an interacting compact triplet (KTS 57) with IC 4687 and 4686 just 1' N.

Notes by Steve Gottlieb