Recorded mission
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United States Air Force
Atlas Agena B | Ranger 4
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Recorded mission coverage
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Mission brief
The flight at a glance.
Ranger 4 was a spacecraft designed to softly impact the lunar surface. Its solar panels were never extended and its sun and earth acquisition system was not initiated due to a failure of a timer in its central computer. It impacted the far side of the Moon on April 26 after 64 hours of flight.
Open the full mission →Published flight sequence
Know what comes next.
Planned timings relative to the target. These steps do not indicate live progress.
A flight sequence has not been published for this mission.