Explorer 21

USA

Interplanetary Monitoring Probe, also called IMP 02 or IMP-B

Launch data:

Designation00889 / 64060A
Launch date04 Oct 1964 - 03:45 UT
Launch siteCC, LC17A
Launch vehicleDelta-C (#392/D26)
MissionScientific:magnetosphere study
Earth orbit :
Perigee/Apogee 191/95590 km
Inclination 33.5°
Period 2097 min
Mass62 kg

End of life

Decay 30 Jan 1966
Ref.: #1, #7, #15 - update: 01.10.18 Home