Launch Overview
Vehicle
Thor Delta C
Agency
United States Air Force
Site / Pad
CC / LC17A
Outcome
Success
Flight
392/D026
COSPAR Designator
1964-060
Mission
Explorer 21 (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.
Vehicle & Provider
Rocket
Thor Delta C
Provider
United States Air Force
Agency launches
214 (39 YTD)
Site launches
121 (15 YTD)
Pad launches
25 (3 YTD)