William Herschel discovered NGC 4564 = H II-68 = h1356 on 15 Mar 1784 (sweep 174) and noted "pB". JH made two observations and measured an accurate position.

300/350mm - 13.1" (5/14/83): moderately bright, small, edge-on streak, fairly high surface brightness.

400/500mm - 17.5" (4/25/87): fairly bright, fairly small, elongated SW-NE, sharp concentration; increases suddenly to a small bright core with a stellar nucleus, fainter extensions. The NGC 4567/NGC 4568 pair lies 11'S at the edge of the 220x field.

Notes by Steve Gottlieb