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Discoverer 4
retired
Earth Observation
LEO
COSPAR 1959-U01
Launched 6/25/1959
Admin Edit
Mission & Launch
Launch Mission
Launch 1959-U01
Launch Vehicle
Thor Agena A
Launch Date
6/25/1959
Last Contact
6/25/1959
Orbit & Mass
Orbit Class
LEO
Altitude
125 km
Inclination
86.3 deg
Dry Mass
182 kg
Total Mass
182 kg
Payload Classification
Mission Type
Earth Observation
Payload Category
IMG
Payload Class
D
Organizations
Operator
U.S. Defense Advanced Research Projects Agency (DARPA)
Manufacturer
Lockheed Martin
Registry
COSPAR ID
1959-U01
Track