EntityQ906154· pop 7· linked from 66 articlesDiscoverer 17Sign in to savereconnaissance satelliteConnectionsCoronaEntityorbital inclinationEntityCourier 1BEntityProject EchoEntityMissile Defense Alarm SystemEntityNASAConceptInternational Standard Book NumberEntityUnited States Air ForceEntityorbital periodEntityOCLC, Inc.EntityapsisEntitylow Earth orbitEntityfocal lengthEntityVostok programmeEntityVandenberg Space Force BaseEntityreconnaissance satelliteEntityLockheed CorporationEntitygeocentric orbitEntityInternational DesignatorEntityKorabl-Sputnik 2EntityCategoriesSatellites formerly orbiting EarthSpacecraft launched in 1960