Launches
Launch SuccessfulArmy Ballistic Missile Agency

Explorer 1

Juno-I

This mission has flown

January 31, 1958

Mission overview

First successfully launched American satellite. It was the first spacecraft to detect the Van Allen Radiation Belt.

Rocket

Juno-I

Mission type

Test Flight

Payload

Explorer 1

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.

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Mission updates

Live updates from our team at the press site will appear here on launch day.