William Rambaut, Lord Rosse's first observing assistant, or possibly Lord Rosse himself, discovered NGC 4110 on 1 April 1848. While observing the globular cluster NGC 4147 he found "a small nebula, RA 3 min less than that of NGC 4147]." Nearly 30 years later it was observed again and placed 3 min, 3.5 sec preceding and 35" south of NGC 4147. This is the first galaxy discovered at Birr Castle.

400/500mm - 17.5" (5/11/02): faint, fairly small, elongated 5:3 NW-SE, 0.8'x0.5', low fairly even surface brightness. A nice mag 12/13 double lies 5.5' S [separation 14"]. Globular cluster NGC 4147 is 43' following.

Notes by Steve Gottlieb