Polaris
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Explorer I
retired
Science Exploration
LEO
COSPAR 1958 ALP
Launched 2/1/1958
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Mission & Launch
Launch Mission
Explorer 1
Launch Vehicle
Jupiter C JunoI
Launch Date
2/1/1958
Last Contact
4/1/1958
Orbit & Mass
Orbit Class
LEO
Altitude
1,450.5 km
Inclination
33.18 deg
Dry Mass
8 kg
Total Mass
14 kg
Payload Classification
Mission Type
Science Exploration
Payload Category
SCI
Payload Class
C
Organizations
Operator
U.S. Army
Manufacturer
NASA Jet Propulsion Laboratory
Registry
COSPAR ID
1958 ALP
UN Registration
A/AC.105/INF.001
Track