Explorer 21
Thor Delta C
United States Air Force
Launch Status
SuccessMission
Explorer 21
Type: Astrophysics
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.
Trajectory
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Location
Space Launch Complex 17A
Cape Canaveral, FL, USA
888 rockets have launched from Cape Canaveral, FL, USA.

Rocket
Thor Delta C – McDonnell Douglas
- Family: Thor
- Length: 27.5 m
- Diameter: 2.44 m
- Launch Mass: 52 T
- Low Earth Orbit Capacity: 81 kg
The Thor Delta C was manufactured by McDonnell Douglas with the first launch on 1963-11-27. Thor Delta C has 8 successful launches and 2 failed launches with a total of 10 launches. American orbital launch vehicle family with Thor first stage and a delta second stage.
Agency
United States Air Force – USAF
- Type: Government
- Abbreviation: USAF
- Country: USA