Progress 20Rocket launchby RussiaLaunch time15 Apr 198408:12:53 UTCsuccessOrbit: LEOSalyut 7 Logistics.MissionRocketPayloadsDockingRocket SoyuzU2launched from Baikonur Cosmodrome, Pad 31/6KazakhstanPayloadsNamePurposeMassCommentProgress 20---Docking to Salyut 7 Docked17 Apr 1984 09:22:00 UTCUndocked6 May 1984 17:46:00 UTCDeorbited7 May 1984 00:32:51 UTC