MISSION NAME
Explorer 21 21
Status
Success
DATE
4 OCT 1964
LAUNCH PROVIDER
United States Air Force
Launch Pad
Space Launch Complex 17A
Description
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.
Thor Delta C
Rocket Description
American orbital launch vehicle family with Thor first stage and a delta second stage.