Heinrich d'Arrest discovered NGC 4510 on 9 Sep 1866 with the 11-inch refractor at Copenhagen. His single position is an excellent match with UGC 7679. He described it as sparkling and almost resolved, so Dreyer called it a cluster in the NGC description. Also see NGC 4521, which may be a duplicate observation.

400/500mm - 17.5" (4/15/93): faint, very small, very small bright core, stellar nucleus, very small halo. NGC 4441 lies 17' SW.

Notes by Steve Gottlieb