EXPLORER 43
| Launched | 12 March 1971 |
| Flight ended | 1 October 1974 |
| Status | Decayed |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 5043 |
| COSPAR ID | 1971-019A |
| Alternative names |
IMP-6 |
| Observing |