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Explorer IV

retired

Science ExplorationLEOCOSPAR 1958 EPSLaunched 7/26/1958

Mission & Launch

Launch Mission: Explorer 4
Launch Vehicle: Jupiter C JunoI
Launch Date: 7/26/1958
Last Contact: 9/19/1958

Orbit & Mass

Orbit Class: LEO
Altitude: 1,245.5 km
Inclination: 50.4 deg
Dry Mass: 12 kg
Total Mass: 17 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 EPS