The KH-4A (Keyhole-4A) was the fifth optical reconnaissance satellite version in the Corona-program. September 23, 1963 at 23:00 UTC · Launch Successful Thor SLV-2A Agena D — United States Air Force, to Low Earth Orbit Space Launch Complex 2W, Vandenberg SFB, CA, USA The world's 271st orbital launch attempt, and 47th of 1963. Data: Launch Library 2, The Space Devs. Image via The Space Devs.