Trajectory & orbital insertion
Ascent path is a representation — true ascent telemetry isn’t public.
Provider
US Navy
Provider type
Government
Orbit
LEO
Mission type
Test Flight
Launch site
United States of America
Date
Wed, 28 May 1958 03:46:20 GMT
Orbital launch #
#12 ever
Mission
Small satellite used to test the Vanguard three-stage launch vehicle.