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 | 75.832° |
| Eccentricity | 0.00358 |
| RA ascending node | 21.656 hr |
| Argument perigee | 180.809° |
| Mean anomaly | 179.306° |
| Orbital period | 96.215 min |
| Epoch of osculation | 02 Apr 2026, 01:55 |
Derived Quantities
| Min Altitude | 559.5 km |
| Mean Altitude | 584.4 km |
| Peak Altitude | 609.3 km |
Orbital History
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