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COSMOS 2129
Launch Details
| Launched | 11 February 1991 |
| Flight ended | – |
| Status | Unknown |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 21104 |
| COSPAR ID | 1991-009E |
| Observing |
Current orbital elements
| Inclination | 74.029° |
| Eccentricity | 0.00248 |
| RA ascending node | 10.881 hr |
| Argument perigee | 15.086° |
| Mean anomaly | 146.859° |
| Orbital period | 114.856 min |
| Epoch of osculation | 18 Oct 2025, 03:39 |
Derived Quantities