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Discoverer 20
retired
Earth Observation
LEO
COSPAR 1961 EPS 1
Launched 2/17/1961
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Mission & Launch
Launch Mission
Discoverer 20
Launch Vehicle
Thor Agena B
Launch Date
2/17/1961
Last Contact
2/21/1961
Orbit & Mass
Orbit Class
LEO
Altitude
526.5 km
Inclination
80.91 deg
Dry Mass
108 kg
Total Mass
848 kg
Payload Classification
Mission Type
Earth Observation
Payload Category
IMG
Payload Class
D
Organizations
Operator
U.S. Air Force
Manufacturer
Lockheed Martin
Registry
COSPAR ID
1961 EPS 1
UN Registration
A/AC.105/INF.001
Track