Ralph Copeland, while an assistant at Birr Castle, discovered NGC 3745 and other members of "Copeland's Septet" on 5 Apr 1874. He noted "pB; pL; R" and labeled it Beta on the constructed sketch made on 13 Apr 1876. See NGC 3753.

400/500mm - 17.5" (5/11/96): this member of Copeland's Septet appears extremely faint and small, round. Located between brighter NGC 3748 1.1' E and NGC 3746 just 0.7' S.

17.5" (3/19/88): second of 7 member of Copeland's Septet. Extremely faint and small, round. Second in a very tight trio with NGC 3746 43" SSW and NGC 3748 1.1' ENE. Located 3.2' NW of NGC 3753.

900/1200mm - 48" (4/16/15): fairly faint to moderately bright, small, round, 15" diameter. Squeezed between slightly brighter and larger NGC 3748 and NGC 3745.

Notes by Steve Gottlieb