DISCOVERER 21
- DISCOVERER 21 DISCOVERER 21
Object Name DISCOVERER 21
Object Full Name -
Norad ID 84
Cospar ID 1961-006A
Object Type Satellite
Object Status Decayed
Object Class -
End of Life -

Discoverer 21 was a USAF photographic surveillance satellite designed to assess how rapidly the Soviet Union was producing long-range bombers and ballistic missiles, and where they were being deployed. It was part of the Corona program which was also used to produce maps and charts for the Department of Defense and other US government mapping programs. Like Discoverer 19, it carried no film capsule. Its purpose was to test whether the rocket engine could be restarted in space.

Launch Date 1961-02-18
Decay Date 1962-04-20
Launch Vehicle -
Launch Site Air Force Western Test Range, California, USA
Launch Provider -
Launch Provider Country -
Launch Mass -
Dry Mass -
User -
Mission -
Mission Detail -
Country of Registry -
Programme -
Operator -
Country of Operator United States
Contractor -
Country of Contractor -
Payload Contractor -
Payload Contractor Country -
Orbit Status Earth Orbit
Orbit -
Orbit Type -
Period: 89.3 min
Inclination: 80.6°
Apogee: 276.0 km
Perigee: 204.0 km
Longitude of Geo -
ECT -
Payload -
Platform -
Propulsion -
Propulsion Type -
Life Time -
Power -
Budget -
Call Sign -
Beacon -
RCS -
References -
Date
Rise
Heights
Set
Pass Time
Visible
Time
Altitude
Azimuth
Time
Altitude
Azimuth
Time
Altitude
Azimuth

					

					

						


					

				

				

				

					

						

							
								

									Angular Momentum:
									-
								

								

									Eccentricity:
									-
								

								

									Inclination:
									-
								

								

									RAAN:
									-
								

								

									Argument of Perigee:
									-
								

								

									True Anomaly:
									-
								

							
						

					

					

						

							
								

									Period:
									-
								

								

									Semi-Major Axis:
									-
								

								

									Perigee:
									-
								

								

									Apogee:
									-
								

								

									Mean Motion:
									-
								

								

									Mean Anomaly:
									-
								

							
						

					

				


				

				

					

						
						
					


					

						

						
					


					

					
				

				

				

			

			


				
				


					

						

					


					

						

							
								

									Latitude:
									-
								

								

									Longitude:
									-
								

								

									Altitude:
									-
								

								

									Speed:
									-
								

								

									Azimuth:
									-
								

								

									Elevation:
									-
								

								

									Range:
									-