James Dunlop discovered NGC 6167 = D 400 = h3635 on 26 Jun 1826 with his 9-inch reflector from Parramatta, New South Wales. He recorded "a pretty large faint nebula, about 6' diameter, easily resolvable, round figure, with two rows of small stars following." His position is 13' northeast of center of the cluster. Apparently D 401 is a duplicate observation: "A very faint cluster of small stars, with a branch extended; the head of the cluster is rich in small stars." His position for D 401 is 16.5' east-southeast of the cluster and he notes 3 observations. JH recorded "a large irregular cluster of loose stars 11..14th magnitude which fills field; place that of an 8th magnitude star in the preceding part."

200/250mm - 8" (7/13/91 - Southern Baja): about 50 stars within a 10' diameter at 63x. Bright, fairly large, rich and pretty with both bright and faint stars. Includes many faint stars over unresolved haze. Includes curved arcs of stars and a nice string of stars to the south. The brightest mag 7.4 star is at the west side. Located on the Norma-Ara border.

400/500mm - 22" (6/28/06 - Hawaii): this bright cluster contains roughly 150 stars in a 10' region. The brightest mag 7.4 star (HD 14919) is on the west edge of the cluster and the richest region is just following this star. At the east edge of this rich group is a nice double star. Several curving strings and sprays of stars crisscross the cluster. NGC 6164/6165 lies 1.7° north.

Notes by Steve Gottlieb