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Kind: Lunar impactor

State: Partial failure

Place: Moon

Operator: NASA

Instruments: 1) Television camera, 2) Gamma ray spectrometer, 3) Radar altimeter, 4) Seismometer,



End: 19620426

Duration: 10 hours (operational)64 hours (to impact)

Mission Ending

"Life's like a movie, write your own ending. Keep believing, keep pretending." - Jim Henson


Rocket: Atlas LV-3 Agena-B

Kind: NASA

Manufacturer: Jet Propulsion Laboratory

Mass: 331.1 kg (730 lb)

Launch Site: Cape Canaveral LC-12


"Requesting permission for flyby." Maverick - Top Gun


"You’re going very fast when you’re on orbit, going around the world once every hour and a half." - Robert Crippen


Place: Lunar

Ranger 4 was a spacecraft of the Ranger program, launched in 1962. It was designed to transmit pictures of the lunar surface to Earth stations during a period of 10 minutes of flight prior to crashing upon the Moon, to rough-land a seismometer capsule on the Moon, to collect gamma-ray data in flight, to study radar reflectivity of the lunar surface, and to continue testing of the Ranger program for development of lunar and interplanetary spacecraft. An onboard computer failure caused failure of the deployment of the solar panels and navigation systems, as a result the spacecraft crashed on the far side of the Moon without returning any scientific data. It was the first spacecraft of the United States to reach another celestial body.