Discoverer 13 was an American optical reconnaissance satellite. The lastof five test flights of the Corona KH-1 spy satellite series. It was the first fully successfuly flight of the Discoverer series. It successfuly jetissoned its payload which was recovered in the Ocean by the Navy. August 10, 1960 at 20:37 UTC · Launch Successful Thor Agena A — United States Air Force, to Low Earth Orbit Space Launch Complex 1E, Vandenberg SFB, CA, USA The world's 71st orbital launch attempt, and 17th of 1960. Data: Launch Library 2, The Space Devs.