Spacecraft information: COSMOS 1861
| Launched | 22 June 1987 |
| Flight ended | – |
| Status | Unknown |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 18129 |
| COSPAR ID | 1987-054A |
| Observing |
Current orbital elements
| Inclination | 82.925° |
| Eccentricity | 0.00128 |
| RA ascending node | 6.770 hr |
| Argument perigee | 112.936° |
| Mean anomaly | 0.108° |
| Orbital period | 104.861 min |
| Epoch of osculation | 11 Dec 2025, 19:55 |
Derived Quantities
| Min Altitude | 985.6 km |
| Mean Altitude | 995.1 km |
| Peak Altitude | 1004.5 km |
Orbital History
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