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INTERCOSMOS 21
Launch Details
| Launched | 5 February 1981 |
| Flight ended | 6 July 1982 |
| Status | Decayed |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 12162 |
| COSPAR ID | 1981-011A |
| Observing |
Launched alongside
SL-8 R/B