Lawrence Parsons, 4th Earl of Rosse, discovered NGC 5752, along with NGC 5753 and 5755 on 1 Apr 1878, while observing NGC 5754. He noted a "double nebula, pos 83.5°, distance 70.3"; p one [NGC 5752] the fainter." NGC 5754 has a very low surface brightness arm on the south side that attaches like a tidal tail to NGC 5752.

400/500mm - 17.5" (6/21/93): first of four in the NGC 5754 group. Extremely faint, very small, 15" diameter, round, averted vision only. In a tight group with NGC 5754 1.1' E and the NGC 5753/NGC 5755 pair 3.5' NNE.

Notes by Steve Gottlieb