John Herschel discovered NGC 433 = h94 on 29 Sep 1829 and described a "star 8m the chief of a small loose cluster." The mag 9.3 star is on the north side of the cluster. Robert Ball observed the cluster using the 72" at Birr Castle and logged "Loose CL. consisting of 50 or 60 stars of various sizes from about 8 mag down."

400/500mm - 17.5" (8/16/93): 30 stars mag 10-14 in a 6' triangular outline although very few stars are inside the triangle. The mag 10 star at the north vertex is surrounded (mostly on the south side) by a rich subgroup of faint stars, including at least three close multiple systems. Mag 8.7 SAO 22122 is just south of the triangle and 8' SSW of the mag 10 star in the cluster.

600/800mm - 24" (1/4/14): the most distinctive part of this cluster is a mag 9.3 star surrounded by a 2' cloud (mostly south) of ~15 mag 13-14 stars. A mag 11 star is at the NW corner, a 50" pair of mag 11 stars is at the SE end and a mag 11.5 star is at the SW corner. A small string of stars extends from the mag 9.3 star to the southwest.

Notes by Steve Gottlieb