Spacecraft information: COSMOS 921
| Launched | 23 June 1977 |
| Flight ended | – |
| Status | Unknown |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 10095 |
| COSPAR ID | 1977-055A |
| Observing |
Current orbital elements
| Inclination | 75.830° |
| Eccentricity | 0.00352 |
| RA ascending node | 10.947 hr |
| Argument perigee | 106.153° |
| Mean anomaly | 254.355° |
| Orbital period | 96.233 min |
| Epoch of osculation | 12 Dec 2025, 05:40 |
Derived Quantities
| Min Altitude | 560.8 km |
| Mean Altitude | 585.3 km |
| Peak Altitude | 609.8 km |
Orbital History
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