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COSMOS 639
Launch Details
| Launched | 3 April 1974 |
| Flight ended | 14 April 1974 |
| Status | Decayed |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 7240 |
| COSPAR ID | 1974-019A |
| Observing |