EXPLORER 1
| Launched | 31 January 1958 |
| Flight ended | 30 March 1970 |
| Status | Decayed |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 4 |
| COSPAR ID | 1958-001A |
| Observing |
EXPLORER 1
| Launched | 31 January 1958 |
| Flight ended | 30 March 1970 |
| Status | Decayed |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 4 |
| COSPAR ID | 1958-001A |
| Observing |