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USA 18
Launch Details
| Launched | 8 February 1986 |
| Flight ended | – |
| Status | Unknown |
| Launch site | Air Force Western Test Range, California, USA |
| Owner | United States |
| NORAD ID | 16631 |
| COSPAR ID | 1986-014H |
| Observing |
Current orbital elements
| Inclination | 63.292° |
| Eccentricity | 0.07897 |
| RA ascending node | 5.555 hr |
| Argument perigee | 107.151° |
| Mean anomaly | 261.750° |
| Orbital period | 103.877 min |
| Epoch of osculation | 14 Sep 2025, 20:01 |
Derived Quantities
| Min Altitude | 370.8 km |
| Mean Altitude | 948.9 km |
| Peak Altitude | 1527.0 km |
Orbital History
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