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Discoverer 18
retired
Earth Observation
LEO
COSPAR 1960 SIG
Launched 12/7/1960
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Mission & Launch
Launch Mission
Discoverer 18
Launch Vehicle
Thor Agena B
Launch Date
12/7/1960
Last Contact
12/10/1960
Orbit & Mass
Orbit Class
LEO
Altitude
404 km
Inclination
81.48 deg
Dry Mass
130 kg
Total Mass
1,040 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
1960 SIG
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