D1 s/n. 1Rocket launchby RussiaLaunch time27 Apr 195809:01 UTCfailureSerial number: B1-2Disintegrated 88 seconds into flight.Maiden flight of Sputnik 8A91.MissionRocketPayloadsRocket Sputniklaunched from Baikonur Cosmodrome, Pad 1/5KazakhstanPayloadsNamePurposeMassCommentD1 s/n. 1---