It was discovered by Charles T. Kowal at the Mount Palomar Observatory on September 14, 1974, after three nights' worth of photographic plates had been taken (September 11 through 13; Leda appears on all of them).
Foi descuberta por Charles T. Kowal no Observatorio de Monte Palomar o 14 de setembro de 1974, despois de tres noites moi proveitosas sacando placas fotográficas (do 11 de setembro ó 13; Leda aparece en placas de tódolos días).