An Etymological Dictionary of Astronomy and Astrophysics

1. The ninth of Jupiter’s known satellites and the smallest. It is 16 km in diameter and has its orbit at 11 million km from its planet. Also called Jupiter XIII, it was discovered by Charles Kowal (1940-), an American astronomer, in 1974.
   
2. An asteroid, 38 Leda, discovered by J. Chacornac in 1856.

See also: In Gk. mythology, Leda was queen of Sparta and the mother, by Zeus in the form of a swan, of Pollux and Helen of Troy.