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Discoverer 31

retired

Earth ObservationLEOCOSPAR 1961 A BETLaunched 9/17/1961

Mission & Launch

Launch Mission: Discoverer 31
Launch Vehicle: Thor Agena B
Launch Date: 9/17/1961
Last Contact: 9/19/1961

Orbit & Mass

Orbit Class: LEO
Altitude: 306.5 km
Inclination: 82.7 deg
Dry Mass: 123 kg
Total Mass: 1,153 kg

Payload Classification

Mission Type: Earth Observation
Payload Category: IMG
Payload Class: D

Organizations

Operator: U.S. National Reconnaissance Office (NRO)
Manufacturer: Lockheed Martin

Registry

COSPAR ID: 1961 A BET