Albert Marth discovered NGC 7523 = m 536, along with NGC 7525, on 3 Nov 1864 and noted "eeF, E." His positions for both objects are off 1' too far southwest.

400/500mm - 17.5" (7/19/90): very faint, very small, round (must have viewed the core only). A mag 14/15 double star is off the north edge. Forms a close pair with NGC 7525 2.5' NE.

Notes by Steve Gottlieb