Army Ballistic Missile AgencyJuno-ILaunch Complex 26A, Cape Canaveral SFS, FL, USA
Explorer 1
Launched
February 1, 1958
Image: NASA
Summary
Explorer 1 launched on an Army Ballistic Missile Agency Juno-I from Launch Complex 26A, Cape Canaveral SFS, FL, USA on February 1, 1958. It was Army Ballistic Missile Agency's 1st launch, 1st this year and humanity's 4th orbital launch attempt. It was the 1st Juno-I flight. The payload was bound for low Earth orbit (LEO).
- Watch
- No webcast on record.
- Vehicle
- Juno-I · Army Ballistic Missile Agency
- Booster
- No booster details on record.
- Mission
- Test Flight · Low Earth Orbit (LEO)
- Milestone
- 1st Juno-I flightArmy Ballistic Missile Agency's 1st launch1st this yearhumanity's 4th orbital launch attempt1st orbital launch attempt this year
Flight preview
About this launch
First successfully launched American satellite. It was the first spacecraft to detect the Van Allen Radiation Belt.
Pad

Launch Complex 26A, Cape Canaveral SFS, FL, USA
1st launch from Launch Complex 26A, 1st this year · 2nd from Cape Canaveral SFS, FL, USA
3 launches from this pad · 1,131 from Cape Canaveral SFS, FL, USA
under an hour after the previous launch from this pad
Questions
When did Explorer 1 launch?
Explorer 1 launched on February 1, 1958. The time is known to the hour, not the minute.
Where can I watch Explorer 1?
No webcast is on record for this launch.
What rocket launched Explorer 1?
Juno-I, flown by Army Ballistic Missile Agency. Juno-I spec sheet
Where did Explorer 1 launch from?
Launch Complex 26A, Cape Canaveral SFS, FL, USA.
What orbit was Explorer 1 going to?
Low Earth Orbit (LEO), a test flight mission.
