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USA 21
Launch Details
| Launched | 11 February 1987 |
| Flight ended | – |
| Status | Unknown |
| Launch site | Air Force Western Test Range, California, USA |
| Owner | United States |
| NORAD ID | 17506 |
| COSPAR ID | 1987-015A |
| Observing |
Current orbital elements
| Inclination | 62.774° |
| Eccentricity | 0.74493 |
| RA ascending node | 1.314 hr |
| Argument perigee | 272.012° |
| Mean anomaly | 12.826° |
| Orbital period | 716.922 min |
| Epoch of osculation | 14 Apr 2024, 00:38 |
Derived Quantities
| Min Altitude | 397.1 km |
| Mean Altitude | 20163.3 km |
| Peak Altitude | 39929.5 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.
Launched alongside
TITAN 34B R/B