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Spacecraft information: COSMOS 990
Launch Details
| Launched | 16 February 1978 |
| Flight ended | – |
| Status | Unknown |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 10676 |
| COSPAR ID | 1978-019A |
| Observing |
Current orbital elements
| Inclination | 74.039° |
| Eccentricity | 0.00171 |
| RA ascending node | 20.994 hr |
| Argument perigee | 306.957° |
| Mean anomaly | 53.001° |
| Orbital period | 100.194 min |
| Epoch of osculation | 20 Mar 2026, 02:04 |
Derived Quantities
| Min Altitude | 762.6 km |
| Mean Altitude | 774.8 km |
| Peak Altitude | 787.1 km |
Orbital History
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