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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 | 63.294° |
| Eccentricity | 0.07991 |
| RA ascending node | 20.136 hr |
| Argument perigee | 105.603° |
| Mean anomaly | 263.460° |
| Orbital period | 103.999 min |
| Epoch of osculation | 28 Jun 2025, 14:05 |
Derived Quantities
| Min Altitude | 369.3 km |
| Mean Altitude | 954.6 km |
| Peak Altitude | 1540.0 km |
Orbital History
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