<Tr> <Th> Mean anomaly </Th> <Td> 48.3249 degrees </Td> </Tr> <Tr> <Th> Mean motion </Th> <Td> 16.275 </Td> </Tr> <Tr> <Th> Epoch </Th> <Td> 31 March 1970, 00: 50: 24 UTC </Td> </Tr> <Tr> <Th> Revolution no . </Th> <Td> 58402 </Td> </Tr>

When did the us launch their first satellite