Thor Delta C | Explorer 21
Status: Success | Launched: Oct 04, 1964 03:45 UTC
Launch Provider & Rocket
- Provider: United States Air Force (Government)
- Rocket: Thor Delta C — Thor family
Mission
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.
- Type: Astrophysics
- Orbit: Elliptical Orbit (Elliptical)
Launch Site
- Pad: Space Launch Complex 17A
- Location: Cape Canaveral SFS, FL, USA
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Launch data sourced automatically from the Launch Library 2 API. Last refreshed: 2026-10-07T05:01:38.698063+00:00.