October 4, 1964 3:45 am
Explorer 21
|
Thor Delta C
Cape Canaveral SFS, FL, USA
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Last Updated:
2026-07-13 21:05:44
Explorer 21 (IMP 2) was a solar-cell and chemical-battery powered spacecraft instrumented for interplanetary and distant magnetospheric studies of energetic particles, cosmic rays, magnetic fields, and plasmas.
Launch Overview
Window Open
03:45 UTC
Window Close
03:45 UTC
Lift Off
Oct 4, 1964 · 03:45 UTC
Launch Facility
Cape Canaveral SFS, FL, USA
Launch Pad
Space Launch Complex 17A
Target Orbit
Elliptical Orbit
Payload Overview
Customer
United States Air Force
Payload
Explorer 21
Rocket
Thor Delta C
Destination
Elliptical Orbit
Recovery Overview
Landing Location
See Mission Notes
Landing Type
RTLS / Droneship
Explorer 21 (IMP 2) was a solar-cell and chemical-battery powered spacecraft instrumented for interplanetary and distant magnetospheric studies of energetic particles, cosmic rays, magnetic fields, and plasmas.
Height
LEO Payload
Total Launches
Status
United States Air Force
Space Launch Complex 17A
Launch Overview
Window Open
03:45 UTC
Window Close
03:45 UTC
Lift Off
Oct 4, 1964 · 03:45 UTC
Launch Facility
Cape Canaveral SFS, FL, USA
Launch Pad
Space Launch Complex 17A
Target Orbit
Elliptical Orbit
Payload Overview
Customer
United States Air Force
Payload
Explorer 21
Rocket
Thor Delta C
Destination
Elliptical Orbit
Recovery Overview
Landing Location
See Mission Notes
Landing Type
RTLS / Droneship
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