Spacecraft information: EXPLORER 55
| Launched | 19 November 1975 |
| Flight ended | 9 June 1981 |
| Status | Decayed |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 8440 |
| COSPAR ID | 1975-107A |
| Alternative names |
AE-5 |
| Observing |
Launched alongside
DELTA 1 R/B