Explorer 4, a JPL/ABMA charged-particle satellite launched on a Juno I from Cape Canaveral LC-5, successfully measured Van Allen belt radiation and effects of the high-altitude Project Argus nuclear detonations before decay in 1959.
- Outcome
- Success
- Orbit
- MEO
- Medium Earth orbit
- Payload to orbit
- 12 kg
- Flight
- 4th
- of 6 Juno-I flights
- Date and time
- 26 July 1958, 15:00 UTC
- Rocket
- Juno-I
- Builder
- Chrysler
- Launch site
- Launch Complex 5, Cape Canaveral SFS, FL, USA
- Payload
- Earth Science
- International designator
- 1958-005
- Launches in 1958
- 12th of 28
See it in orbit
Space Atlas shows the satellites and rocket stages from this launch in 3D.
View satellites in Space Atlas