Army Ballistic Missile AgencyLaunch SuccessfulEarth Science

Explorer 4

Name: Juno-I | Explorer 4
Start: 1958-07-26T15:00:57Z
Location: Launch Complex 5, Cape Canaveral SFS, FL, USA

Juno-I

Launched Sat, Jul 26 · 3:00:57 PM UTC1958-07-26 15:00:57 UTCLaunch Complex 5, Cape Canaveral SFS, FL, USA

Reached orbit

Follow Army Ballistic Missile Agency in the app

Success

Reached Medium Earth Orbit

Worldwide

12th

orbital launch attempt in 1958

Army Ballistic Missile Agency

4th

launch this year

Launch Complex 5

1st

launch from this pad this year

Mission

An American satellite in order to study the Van Allen radiation belts and the effects of nuclear explosions upon these belts.

Launch Provider

Army Ballistic Missile Agency

Government · United States of America

The Army Ballistic Missile Agency was formed to develop the U.S. Army's first large ballistic missile. The agency was established at Redstone Arsenal on 1 February 1956, and commanded by Major General John B. Medaris with Wernher von Braun as technical director.

Launches

Successful

42%

Upcoming

scheduled

All Army Ballistic Missile Agency launches Wikipedia

Juno-I

Vehicle history

Height

21.2m

Diameter

1.8m

To low Earth orbit

11kg

Liftoff thrust

416kN

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Army Ballistic Missile AgencyLaunch SuccessfulEarth Science

Explorer 4

Juno-I

Launched Sat, Jul 26 · 3:00:57 PM UTC1958-07-26 15:00:57 UTCLaunch Complex 5, Cape Canaveral SFS, FL, USA

Reached orbit

Follow Army Ballistic Missile Agency in the app

Success

Reached Medium Earth Orbit

Worldwide

12th

orbital launch attempt in 1958

Army Ballistic Missile Agency

4th

launch this year

Launch Complex 5

1st

launch from this pad this year

Mission

An American satellite in order to study the Van Allen radiation belts and the effects of nuclear explosions upon these belts.

Launch Provider

Army Ballistic Missile Agency

Government · United States of America

Launches

Successful

42%

Upcoming

scheduled

All Army Ballistic Missile Agency launches Wikipedia

Juno-I

Vehicle history

Height

21.2m

Diameter

1.8m

To low Earth orbit

11kg

Liftoff thrust

416kN

Next From Cape Canaveral SFS

Cape Canaveral SFS schedule

Nov13Fri

Amazon Leo (LV-01)United Launch Alliance · Vulcan VC6L · Space Launch Complex 41, Cape Canaveral SFS, FL, USALow Earth OrbitTo be determinedTime TBD Nov—NET

Cygnus CRS-2 NG-25SpaceX · Falcon 9 Block 5 · Space Launch Complex 40, Cape Canaveral SFS, FL, USALow Earth OrbitTo be determinedNET November

Space Launch Now for iOS and Android

Notifications before every launch you follow, live countdowns on your home screen and watch, and webcasts as they start.

See what's in the app

Scan to open on your phone

Explorer 4

Mission

Army Ballistic Missile Agency

Juno-I

Never Miss a Launch.

Explorer 4

Mission

Army Ballistic Missile Agency

Juno-I

Next From Cape Canaveral SFS

Never Miss a Launch.

Next From Cape Canaveral SFS