Vanguard SLV-2, carrying a 10 kg Lyman-alpha/geodetic satellite for the Naval Research Laboratory's Project Vanguard, launched from Cape Canaveral LC-18A on 26 June 1958. Premature second-stage cutoff after only about eight seconds of burn left insufficient velocity and the payload failed to reach orbit.
- Outcome
- Failure
- Orbit
- LEO
- Low Earth orbit
- Payload to orbit
- Did not reach orbit
- Flight
- 6th
- of 11 Vanguard flights
- Date and time
- 26 June 1958, 05:00 UTC
- Rocket
- Vanguard
- Builder
- LM
- Launch site
- Launch Complex 18A, Cape Canaveral SFS, FL, USA
- Payload
- Test Flight
- Launches in 1958
- 10th of 28