John Herschel discovered NGC 7456 = h3966 = h3967 on 4 Sep 1834 and recorded "F; L; mE; vglbM; pos of elongation 33.8°; 4' l, 1' br; loses itself imperceptibly. His Cape position for h3966 is 30' too far south but he corrected this clerical mistake in the errata page at the end of the catalogue. His position for h3967 is correct.

300/350mm - 13.1" (9/3/86): very faint, diffuse, moderately large, elongated SW-NE. A pair of mag 13 stars is 3' E of center.

Notes by Steve Gottlieb