Vanguard TV-3BU, the backup to the failed TV-3, attempted a second U.S. Vanguard satellite launch from Cape Canaveral on 5 February 1958. A control-system malfunction about 57 seconds after liftoff caused extreme pitch, vehicle breakup, and range-safety destruction.
- Outcome
- Failure
- Orbit
- LEO
- Low Earth orbit
- Payload to orbit
- Did not reach orbit
- Flight
- 2nd
- of 11 Vanguard flights