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RADIO 4
Launch Details
| Launched | 16 December 1981 |
| Flight ended | – |
| Status | Unknown |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 13000 |
| COSPAR ID | 1981-120D |
| Observing |
Current orbital elements
| Inclination | 82.962° |
| Eccentricity | 0.00174 |
| RA ascending node | 23.952 hr |
| Argument perigee | 217.323° |
| Mean anomaly | 169.737° |
| Orbital period | 119.313 min |
| Epoch of osculation | 15 Dec 2024, 23:58 |
Derived Quantities
| Min Altitude | 1643.3 km |
| Mean Altitude | 1657.2 km |
| Peak Altitude | 1671.1 km |
Orbital History
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