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Spacecraft information: COSMOS 1877
Launch Details
| Launched | 6 September 1987 |
| Flight ended | – |
| Status | Unknown |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 18336 |
| COSPAR ID | 1987-074C |
| Observing |
Current orbital elements
| Inclination | 82.565° |
| Eccentricity | 0.00028 |
| RA ascending node | 3.832 hr |
| Argument perigee | 96.738° |
| Mean anomaly | 327.316° |
| Orbital period | 113.955 min |
| Epoch of osculation | 12 Dec 2025, 07:00 |
Derived Quantities
| Min Altitude | 1412.9 km |
| Mean Altitude | 1415.0 km |
| Peak Altitude | 1417.2 km |
Orbital History
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