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Facts
Sources: Wikidata (CC0) · Wikidata Q1192304
Launches · 6
| Spacecraft | Launch | Operator |
|---|---|---|
| Beacon 1 | October 23, 1958 | — |
 Explorer 5 | August 24, 1958 | — |
 Explorer 4 | July 26, 1958 | — |
 Explorer 3 | March 26, 1958 | Army Ballistic Missile Agency, Jet Propulsion Laboratory |
 Explorer 2 | March 5, 1958 | — |
 Explorer 1 | February 1, 1958 | Army Ballistic Missile Agency |