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Spacecraft information: UFO 8
Launch Details
| Launched | 15 March 1998 |
| Flight ended | – |
| Status | Non-operational |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 25258 |
| COSPAR ID | 1998-016A |
| Alternative names |
USA 138 |
| Observing |
Current orbital elements
| Inclination | 10.913° |
| Eccentricity | 0.00081 |
| RA ascending node | 1.588 hr |
| Argument perigee | 257.351° |
| Mean anomaly | 110.640° |
| Orbital period | 1435.625 min |
| Epoch of osculation | 20 Dec 2025, 10:29 |
Derived Quantities
| Min Altitude | 35750.5 km |
| Mean Altitude | 35784.5 km |
| Peak Altitude | 35818.5 km |
Launched alongside
ATLAS 2 CENTAUR R/BOrbital History
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