Discovered 1857 June 27 by H. Goldschmidt at Paris.
Named by the discoverer in honor of the French empress and Spanish noblewoman Eugenia de Montijo de Guzmán (1826–1920), wife of Napoleon III. (H 7)
This is the first example of assigning the name of a human being to a minor planet. William J. Merline et al. reported the discovery of a satellite of (45) on 1998 Nov. 1. The moon with the preliminary designation S/1998 (45) 1 orbits the minor planet in a near-circular orbit every 4.7 days (IAU Circ. No. 7129).