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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 | 63.291° |
| Eccentricity | 0.08057 |
| RA ascending node | 5.502 hr |
| Argument perigee | 104.578° |
| Mean anomaly | 264.594° |
| Orbital period | 104.096 min |
| Epoch of osculation | 09 May 2025, 05:25 |
Derived Quantities
| Min Altitude | 368.6 km |
| Mean Altitude | 959.2 km |
| Peak Altitude | 1549.8 km |
Orbital History
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