OPS 3978
| Launched | 20 December 1972 |
| Flight ended | 22 January 1973 |
| Status | Decayed |
| Launch site | Air Force Western Test Range, California, USA |
| Owner | United States |
| NORAD ID | 6321 |
| COSPAR ID | 1972-103A |
| Observing |
OPS 3978
| Launched | 20 December 1972 |
| Flight ended | 22 January 1973 |
| Status | Decayed |
| Launch site | Air Force Western Test Range, California, USA |
| Owner | United States |
| NORAD ID | 6321 |
| COSPAR ID | 1972-103A |
| Observing |