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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 | 63.298° |
| Eccentricity | 0.09006 |
| RA ascending node | 13.519 hr |
| Argument perigee | 69.214° |
| Mean anomaly | 300.295° |
| Orbital period | 106.361 min |
| Epoch of osculation | 03 Sep 2025, 03:07 |
Derived Quantities
| Min Altitude | 395.4 km |
| Mean Altitude | 1065.2 km |
| Peak Altitude | 1734.9 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.