Spacecraft information: DELTA 1 R/B
| Launched | 19 November 1975 |
| Flight ended | 18 March 1976 |
| Status | Decayed |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 8441 |
| COSPAR ID | 1975-107B |
| Observing |
Launched alongside
EXPLORER 55