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Explorer 18

Interplanetary Monitoring Probe, also called IMP 01


Designation 00693 / 63046A
Launch date 27 Nov 1963
Country of origin United States
Mission Scientific: magnetosphere study
Perigee/Apogee 192/197616 km
Inclination 33.3°
Period 5666.2 min
Launch vehicle Thor Delta #21

End of life

Decay 30 Dec 1965

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