Discovered 1861 Apr. 29 by R. Luther at Düsseldorf.

Named for the daughter of Coeus and Phoebe and mother of Artemis {see planet (105)} and Apollo {see planet (1862)} by Zeus {see planet (5731)}. (H 10)

Named by F. W. A. Argelander, C. N. A. Krueger and Tiele at Bonn.

The Latin name for Leto is Latona — see planet (639).