MISSION OVERVIEW
First successfully launched American satellite. It was the first spacecraft to detect the Van Allen Radiation Belt.
LAUNCH DETAILS
VEHICLE
Juno-IMISSION
Explorer 1
MISSION TYPE
Test Flight
TARGET ORBIT
Low Earth Orbit
LAUNCH PAD
Launch Complex 26ALAUNCH SITE
Cape Canaveral SFS, FL, USACOUNTRY
USA
LAUNCH TIME VERIFICATION
CONFIRMEDPrecision: Minute
LAUNCH LIBRARY 2 PRIMARY
API ID: 1b9e28d0-c531-44b0-9b37-244e62a6d3f4
Reported date: Feb 1, 1958 at 03:47 UTC
Last synced: 1 hour ago
This launch date and time are confirmed by the launch provider. Countdown is active.
LAUNCH MAP
PAD WEATHER
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DEEP SPACE PROBE →
Juno
Jupiter
NASA / JPLOPERATOR
OrbiterTYPE
5.2 AUFROM SUN
EXTENDED MISSION
VEHICLE — Juno-I →
MANUFACTURER
Chrysler
VARIANT
Juno I
FLIGHTS
6
SUCCESSES
3
SUCCESS RATE
50%
The Juno I was a four-stage American booster rocket which launched America's first satellite, Explorer 1 in 1958. A member of thr redstone family, it was derived from the Jupiter-C sounding rocket.
FREQUENTLY ASKED QUESTIONS
When is the Juno-I | Explorer 1 launch?
The Juno-I | Explorer 1 is scheduled for Saturday, February 1, 1958 at 3:47 AM UTC. This is the NET (No Earlier Than) time and may be subject to change. Current status: SUCCESS.
What rocket is being used for Explorer 1?
The Juno-I | Explorer 1 mission uses the Juno-I rocket, manufactured by Chrysler. The Juno-I has flown 6 times with a 50% success rate.
Where is the Juno-I | Explorer 1 launching from?
The launch takes place from Launch Complex 26A at Cape Canaveral SFS, FL, USA.
What orbit is Explorer 1 going to?
The Explorer 1 mission is targeting Low Earth Orbit.
Who is launching Explorer 1?
The Juno-I | Explorer 1 is operated by Army Ballistic Missile Agency.
Can I watch the Juno-I | Explorer 1 launch live?
Yes. Visit the launch detail page on Space Launch Live for embedded YouTube webcasts, replay videos, and links to live coverage from SpaceX, NASA, NASASpaceflight, and other channels.
LAUNCH TIMELINE
Mar 28, 2026 20:12 UTC
Launch added to tracker
Imported from Launch Library 2 API
Mar 28, 2026 20:12 UTC
Launch date set: Feb 1, 1958 at 03:47 UTC
NET (No Earlier Than) confirmed by Army Ballistic Missile Agency
Mar 28, 2026 20:12 UTC
Launch completed successfully
Updated via Launch Library 2
Feb 18, 2026 19:23 UTC
42 Years of Measuring the Sun, the Earth and the Energy in BetweenBy Denise Lineberry On Jan. 31, 1958, Explorer 1 became the first satellite launched by the United States. Its primary science instrument, a cosmic ray…
NASA
LIVE DATA SOURCES
Last data sync: 1 hour ago
●Launch Library 21 hour ago
Launch ID: 1b9e28d0-c531-44b0-9b37-244e62a6d3f4
●Spaceflight News API1 hour ago
2 articles matched
●Open-Meteo Weather1 hour ago
Pad weather at 28.44, -80.57
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