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IMP-3 Explorer 28 Interplanetary Monitoring Platform spacecraft

NASA's IMP-3 (Explorer 28) was launched on 29 May 1965 into an orbit reaching about 40 Earth radii. It returned abundant scientific data on Earth's magnetosphere, the bow shock, and interplanetary space, including magnetic-field, cosmic-ray, and solar-wind measurements, before re-entry.

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Identity

Aliases
IMP-3IMP 3IMP-CExplorer 28Interplanetary Monitoring Platform-3
Family Name
IMP-3
Full Name
IMP-3 Explorer 28 Interplanetary Monitoring Platform spacecraft
Roles
orbiterinterplanetary_probeobservatoryresearch
Status
retired
Type
spacecraft

Details

Description
NASA's IMP-3 (Explorer 28) was launched on 29 May 1965 into an orbit reaching about 40 Earth radii. It returned abundant scientific data on Earth's magnetosphere, the bow shock, and interplanetary space, including magnetic-field, cosmic-ray, and solar-wind measurements, before re-entry.
First Flight Year
1,965
Last Flight Year
1,968
Operator

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Creation Time
August 13, 2026 at 13:31:28 UTC
Updated Time
August 14, 2026 at 16:53:33 UTC