1964 · United States Air Force
Explorer 21
successThor Delta C | Explorer 21
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.
Overview
- Date / time
- October 4, 1964 at 03:45 AM UTC
- Outcome
- success
- Launch site
- Space Launch Complex 17A
- Mission
- Explorer 21
- Mission type
- Astrophysics
- Orbit achieved
- Elliptical Orbit