Spacecraft information: COSMOS 1891
| Launched | 13 October 1987 |
| Flight ended | – |
| Status | Unknown |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 18402 |
| COSPAR ID | 1987-087A |
| Observing |
Current orbital elements
| Inclination | 82.919° |
| Eccentricity | 0.00513 |
| RA ascending node | 18.958 hr |
| Argument perigee | 60.101° |
| Mean anomaly | 300.523° |
| Orbital period | 104.809 min |
| Epoch of osculation | 15 Mar 2026, 12:43 |
Derived Quantities
| Min Altitude | 954.9 km |
| Mean Altitude | 992.7 km |
| Peak Altitude | 1030.5 km |
Launched alongside
SL-8 R/BOrbital History
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