John Herschel discovered NGC 6152 = h3631 on 8 Jul 1834 and logged a large and coarse milky way cluster, tolerably insulated, composed of large stars." His position is near the center of this large cluster.

400/500mm - 18" (7/9/02 - Magellan Observatory, Australia): At 76x (27mm Panoptic), this is a large 30' cluster in a glorious Milky Way field. A couple of hundred stars generally mag 10 and fainter are resolved including a few dense clumps of stars. Many of the stars are arranged in loops and knots. A wide mag 8/10 pair is on the east side. The surrounding region is rich, so the cluster does no stand out except at low power.

Notes by Steve Gottlieb