Discoverer 20Rocket launchby USALaunch time17 Feb 196120:25 UTCsuccessOrbit: LEOSerial number: Thor 298MissionRocketPayloadsRocket ThorDM-21 Agena-Blaunched from Vandenberg AFB, LC-75-3-4USAPayloadsNamePurposeMassCommentDiscoverer 20Reconnaissance--