Mission overview
First successfully launched American satellite. It was the first spacecraft to detect the Van Allen Radiation Belt.
Launch complex
Launch Complex 26A · Cape Canaveral SFS, FL, USA
Launch date
January 31, 1958
Launch window
Instantaneous window
Orbit reached
Low Earth Orbit
Launch trajectory
The launch pad has not been identified. No flight path is shown.
Your viewing outlook
AI-poweredBased on the available launch details, not live local weather or a confirmed flight path. Visibility is not guaranteed.
Mission updates
Live updates from our team at the press site will appear here on launch day.