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USA 56
Launch Details
| Launched | 10 April 1990 |
| Flight ended | – |
| Status | Unknown |
| Launch site | Air Force Western Test Range, California, USA |
| Owner | United States |
| NORAD ID | 20560 |
| COSPAR ID | 1990-031A |
| Observing |
Current orbital elements
| Inclination | 89.848° |
| Eccentricity | 0.00624 |
| RA ascending node | 17.733 hr |
| Argument perigee | 165.604° |
| Mean anomaly | 194.698° |
| Orbital period | 97.499 min |
| Epoch of osculation | 15 Sep 2025, 06:55 |
Derived Quantities
| Min Altitude | 602.3 km |
| Mean Altitude | 646.1 km |
| Peak Altitude | 689.9 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.
Launched alongside
USA 57 USA 58 ATLAS 28E R/B ATLAS 28E DEB ATLAS 28E DEB ATLAS 28E DEB ATLAS 28E DEB USA 56-58 DEB