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COSMOS 539
Launch Details
| Launched | 20 December 1972 |
| Flight ended | – |
| Status | Unknown |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 6319 |
| COSPAR ID | 1972-102A |
| Observing |
Current orbital elements
| Inclination | 74.016° |
| Eccentricity | 0.00245 |
| RA ascending node | 14.796 hr |
| Argument perigee | 233.057° |
| Mean anomaly | 192.226° |
| Orbital period | 112.905 min |
| Epoch of osculation | 21 Sep 2023, 20:59 |
Derived Quantities
| Min Altitude | 1348.1 km |
| Mean Altitude | 1367.1 km |
| Peak Altitude | 1386.1 km |
Orbital History
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