Juno I
American IRBM-derived small-lift orbital rocket
A Jupiter-C fitted with a fourth solid-fuel stage, Juno I launched Explorer 1 on 31 January 1958 — the first US satellite, and the one that discovered the Van Allen radiation belts. Six launches in 1958; only three reached orbit, but the first was enough to matter.
- launches
- 6
- success · 3/6
- 50%
Full Launch History
Oct 23, 1958Failure | Beacon satellite USA • Juno I |
Aug 24, 1958Failure | Explorer 5 USA • Juno I |
Jul 26, 1958 | Explorer 4 USA • Juno I |
Mar 26, 1958 | Explorer 3 USA • Juno I |
Mar 5, 1958Failure | Explorer 2 USA • Juno I |
Feb 1, 1958 | Explorer 1 USA • Juno I |