natural decay of the orbit no later than October 31, 1967, between 22–30 degrees W longitude. See also Lunar Orbiter Image Recovery Project Exploration of the Moon Lunar Orbiter 1 Lunar Orbiter 2 Lunar Orbiter 3 Lunar Orbiter 5 List of artificial objects on the Moon References 4 Spacecraft launched in 1967 Spacecraft that orbited the Moon Spacecraft that impacted the Moon 1967 on the Moon