EntityQ906142· pop 6· linked from 65 articlesDiscoverer 11Sign in to saveAmerican military reconnaissance satelliteConnectionsCoronaEntityUnited States Air ForceEntityCourier 1BEntityProject EchoEntityMissile Defense Alarm SystemEntityInternational Standard Book NumberEntityorbital periodEntityapsisEntityOCLC, Inc.EntityGeneral ElectricCompanylow Earth orbitEntityorbital inclinationEntityUnited States Department of DefenseConceptorbital eccentricityEntityepochEntityLockheed U-2EntityVostok programmeEntityDefense Advanced Research Projects AgencyEntityreconnaissance satelliteEntityLockheed CorporationEntityCategoriesSpacecraft launched in 1960Spacecraft which reentered in 1960