John Herschel discovered NGC 1644 = h2657 on 2 Nov 1834 and recorded "pB, S, R, gbM, 15"." His position matches this LMC cluster (possible globular).

600/800mm - 24" (11/18/12 - Magellan Observatory, Australia): moderately bright and large, round, 40" diameter, small bright core, smooth halo, no resolution (brightest stars are mag 17). Located 5' S of mag 9.3 HD 29878. NGC 1641, a scattered group of stars, lies 28' NNW.

Notes by Steve Gottlieb