Spacecraft information: COSMOS 539
| 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 | 74.018° |
| Eccentricity | 0.00234 |
| RA ascending node | 18.388 hr |
| Argument perigee | 106.705° |
| Mean anomaly | 318.419° |
| Orbital period | 112.903 min |
| Epoch of osculation | 12 Jun 2026, 07:42 |
Derived Quantities
| Min Altitude | 1349.0 km |
| Mean Altitude | 1367.0 km |
| Peak Altitude | 1385.1 km |
Orbital History
Drag the graphs below left or right to change the time range, or use your scroll wheel to zoom in or out.