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IMP-8 Explorer 50 Interplanetary Monitoring Platform spacecraft

NASA's IMP-8 (Explorer 50) was launched on 26 October 1973 to study cosmic rays, energetic solar particles, plasma, and electric and magnetic fields in interplanetary space, the magnetotail, and magnetospheric boundaries. Operating in a near-circular orbit about 35 Earth radii from Earth, it provided long-duration solar-wind measurements and a one-AU baseline for deep-space Voyager and Ulysses studies.

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Identity

Aliases
IMP-8IMP 8IMP-JExplorer 50Interplanetary Monitoring Platform-8
Family Name
IMP-8
Full Name
IMP-8 Explorer 50 Interplanetary Monitoring Platform spacecraft
Roles
orbiterinterplanetary_probeobservatoryresearch
Status
retired
Type
spacecraft

Details

Description
NASA's IMP-8 (Explorer 50) was launched on 26 October 1973 to study cosmic rays, energetic solar particles, plasma, and electric and magnetic fields in interplanetary space, the magnetotail, and magnetospheric boundaries. Operating in a near-circular orbit about 35 Earth radii from Earth, it provided long-duration solar-wind measurements and a one-AU baseline for deep-space Voyager and Ulysses studies.
First Flight Year
1,973
Last Flight Year
2,006

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Creation Time
August 13, 2026 at 13:25:43 UTC
Updated Time
August 13, 2026 at 13:25:43 UTC