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Spacecraft information: USA 77
Launch Details
| Launched | 7 November 1991 |
| Flight ended | – |
| Status | Unknown |
| Launch site | Air Force Western Test Range, California, USA |
| Owner | United States |
| NORAD ID | 21809 |
| COSPAR ID | 1991-076E |
| Observing |
Current orbital elements
| Inclination | 63.299° |
| Eccentricity | 0.09000 |
| RA ascending node | 18.291 hr |
| Argument perigee | 71.268° |
| Mean anomaly | 298.378° |
| Orbital period | 106.274 min |
| Epoch of osculation | 20 Dec 2025, 12:13 |
Derived Quantities
| Min Altitude | 392.2 km |
| Mean Altitude | 1061.1 km |
| Peak Altitude | 1730.0 km |
Orbital History
Drag the graphs below left or right to change the time range, or use your scroll wheel to zoom in or out.