John Herschel discovered NGC 1813 = h2752 on 16 Dec 1835 and observed on a single sweep. His description reads "vF; S; R; r" and his position is just 0.1 tmin preceding the center of the cluster.

600/800mm - 30" (11/6/10 - Coonabarabran, 264x): first in a string of three clusters with NGC 1823 4' ESE and S-L 200 7' SE (within stellar association LH 18). Appears as an irregular 45" glow with a single brighter mag 14 star on the south end and three fainter stars aligned E-W resolved on the north side.

Notes by Steve Gottlieb