Universe & space

Discovery of Leda

14 September 1974

Leda is a small moon of Jupiter, discovered on 14 September 1974 by the American astronomer Charles Kowal from photographic plates taken at Palomar Observatory in California. It was the thirteenth Jovian moon to be found, and the first discovered since 1951. It orbits far beyond the large Galilean moons, well outside the planet's inner moons, and belongs to the Himalia group, a family of moons that probably formed from the break-up of a larger body. Leda is only a few kilometers in radius and was named after the mythological Leda, the mother of Helen of Troy and a lover of Zeus, whose Roman counterpart is Jupiter.

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