William Herschel discovered NGC 4789 = H II-345 = h1473 on 6 Apr 1785 (sweep 393) and noted "F. Just south of a pB star." Both Herschels missed nearby NGC 4787, which was discovered by d'Arrest.

400/500mm - 17.5" (3/20/93): fairly faint, very small, slightly elongated N-S. A mag 10 star is just 40" N of center. Forms a pair with close NGC 4787 3.0' W. Located 18' NNE of mag 6.9 SAO 82554. Outlying member of AGC 1656.

Notes by Steve Gottlieb