Leda (lee'-da, IPA [ˈliːdə], Greek Λήδα) is a satellite of Jupiter that was discovered by Charles T. Kowal at the Mount Palomar Observatory on September 14, 1974, right after three nights' worth of photographic plates had been taken (September 11 through 13; Leda appears on all of them).
It is named after the queen of Sparta who was the mother of Castor, Polydeuces, Clytemnestra and Helen of Troy (Zeus, in the form of a swan, was the father).
Kowal, C.T. et al., "Thirteenth satellite of Jupiter", AJ Themisto
CharlesKowal discovered Chiron in 1977 while he was examining some photographic plates.
An asteroid, planetoid or comet (opinion is divided on it’s astronomical status), Chiron was discovered in 1977 on November 1, by CharlesKowal, between the orbit of Saturn and Uranus...
But Kowal suspected it may be very comet-like, and later it has even developed a short cometary tail...
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