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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 | 62.938° |
| Eccentricity | 0.74507 |
| RA ascending node | 0.336 hr |
| Argument perigee | 272.928° |
| Mean anomaly | 12.557° |
| Orbital period | 715.697 min |
| Epoch of osculation | 12 Jul 2024, 14:08 |
Derived Quantities
| Min Altitude | 385.7 km |
| Mean Altitude | 20133.1 km |
| Peak Altitude | 39880.5 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