EntityQ81861· pop 8· linked from 64 articlesDiscoverer 18Sign 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 2EntityCategoriesSpacecraft launched in 1960Spacecraft which reentered in 1961