OPS 1721
| Launched | 1 May 1969 |
| Flight ended | 15 February 1970 |
| Status | Decayed |
| Launch site | Air Force Western Test Range, California, USA |
| Owner | United States |
| NORAD ID | 3915 |
| COSPAR ID | 1969-041B |
| Observing |
OPS 1721
| Launched | 1 May 1969 |
| Flight ended | 15 February 1970 |
| Status | Decayed |
| Launch site | Air Force Western Test Range, California, USA |
| Owner | United States |
| NORAD ID | 3915 |
| COSPAR ID | 1969-041B |
| Observing |