MISSION NAME
Vanguard 4
Status
Failure
DATE
29 APR 1958
LAUNCH PROVIDER
US Navy
Launch Pad
Launch Complex 18A
Description
Small satellite used to test the Vanguard three-stage launch vehicle.
Vanguard
Rocket Description
The Vanguard rocket was intended to be the first launch vehicle the United States would use to place a satellite into orbit. Instead, the Sputnik crisis caused by the surprise launch of Sputnik 1 led the U.S., after the failure of Vanguard TV3, to quickly orbit the Explorer 1 satellite using a Juno I rocket, making Vanguard I the second successful U.S. orbital launch.