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Ranger 1

Ranger 1 was NASA’s first standardized Ranger test mission, intended to validate technologies and study particles and fields in interplanetary space before later lunar imaging missions. An Agena B injection-stage malfunction stranded the spacecraft in low Earth orbit after its August 23, 1961 launch, and it reentered on August 30.

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Identity

Aliases
Ranger 1Ranger IRanger 1 Test Mission
Name
Ranger 1
Status
failed

Details

Astronauts
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Description
Ranger 1 was NASA’s first standardized Ranger test mission, intended to validate technologies and study particles and fields in interplanetary space before later lunar imaging missions. An Agena B injection-stage malfunction stranded the spacecraft in low Earth orbit after its August 23, 1961 launch, and it reentered on August 30.
Destination
Failed translunar injection; stranded in low Earth orbit at approximately 501 × 168 km before reentry
End Date
1961-08-30
Launch Site
Programs
Start Date
1961-08-23
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Creation Time
August 14, 2026 at 17:04:37 UTC
Updated Time
August 21, 2026 at 13:38:25 UTC

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