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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 | 82.957° |
| Eccentricity | 0.00180 |
| RA ascending node | 8.620 hr |
| Argument perigee | 355.893° |
| Mean anomaly | 135.727° |
| Orbital period | 119.314 min |
| Epoch of osculation | 21 Apr 2024, 12:45 |
Derived Quantities
| Min Altitude | 1642.8 km |
| Mean Altitude | 1657.2 km |
| Peak Altitude | 1671.7 km |
Orbital History
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