Status
Partial Failure
Explorer 21 (IMP-B)
Launch Time
Sun Oct 04, 1964 03:45 UTC
Sun Oct 04, 1964 03:45 UTC
Reached lower than planned orbit
Rocket
Mission Details
Explorer 21
Explorer 21, also called IMP-B and Interplanetary Monitoring Platform IMP-B, was an American satellite launched as part of Explorers program. Explorer 21 was the second satellite of the Interplanetary Monitoring Platform.
Payloads: 1
Total Mass: 138.0 kg
Highly Elliptical Orbit
Location
SLC-17A, Cape Canaveral SFS, Florida, USA
Stats
1964
70th orbital launch attempt
Delta C
2nd mission
1st mission of 1964