Mars Polar LanderRocket launchby USALaunch time3 Jan 199920:21 UTCsuccessOrbit: HeliocentricSerial number: Delta 265Payload later failed, Mars lander.MissionRocketPayloadsRocket DeltaII 7425launched from Cape Canaveral, SLC-17BUSAPayloadsTotal mass 290 kgNamePurposeMassCommentMars Polar Lander---