John Herschel discovered NGC 3564 = h3320 on 21 Apr 1835 and logged "F; S; R; bM. On the same parallel with [NGC 3557]." His position matches ESO 377-018 = PGC 33923. Joseph Turner, observing with the 48" Melbourne Telescope on 29 Mar 1878, noted the nebula was not round, as stated by Herschel, but elongated SSW-NNE. (p. 165 logbook).

300/350mm - 13.1" (2/17/04 - Costa Rica): fairly faint, fairly small, elongated 5:2 SSW-NNE, 1.4'x0.6', weak concentration and tapers at the ends (spindle-shaped). Follows NGC 3557 by 7.7' in a group (Klemola 18) and bracketed by two mag 13 stars 2' NW and 2' SE.

Notes by Steve Gottlieb