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Spacecraft information: COSMOS 1687
Launch Details
| Launched | 29 September 1985 |
| Flight ended | – |
| Status | Unknown |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 16103 |
| COSPAR ID | 1985-088A |
| Observing |
Current orbital elements
| Inclination | 71.908° |
| Eccentricity | 0.55474 |
| RA ascending node | 0.744 hr |
| Argument perigee | 339.133° |
| Mean anomaly | 244.773° |
| Orbital period | 716.995 min |
| Epoch of osculation | 10 May 2026, 11:43 |
Derived Quantities
| Min Altitude | 5444.5 km |
| Mean Altitude | 20165.1 km |
| Peak Altitude | 34885.7 km |
Orbital History
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