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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 | 71.340° |
| Eccentricity | 0.56445 |
| RA ascending node | 1.730 hr |
| Argument perigee | 349.558° |
| Mean anomaly | 217.535° |
| Orbital period | 717.629 min |
| Epoch of osculation | 29 Jun 2025, 03:31 |
Derived Quantities
| Min Altitude | 5193.7 km |
| Mean Altitude | 20180.8 km |
| Peak Altitude | 35167.8 km |
Orbital History
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