Polaris Intelligence
Information
Organizations
Products
Spacecraft
Missions
Constellations
Launch Vehicles
Locations
Discoverer 21
retired
Admin Edit
Orbit: LEO
Launched 2/18/1961
Technical Specifications
Verified technical details
Dry Mass
146 kg
Total Mass
936 kg
Power
Unknown
Design Life
Unknown
Stakeholders
Operator
U.S. Air Force
Manufacturer
Lockheed Martin
Launch Mission
Discoverer 21
2/18/1961