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    NAVSTAR 50
            Launch Details
            
                
        
                    | Launched | 29 January 2001 | 
| Flight ended | – | 
| Status | Non-operational | 
| Launch site | Air Force Eastern Test Range, Florida, USA | 
| Owner | United States | 
| NORAD ID | 26690 | 
| COSPAR ID | 2001-004A | 
| Alternative names | USA 156 GPS BIIR-07 SVN 54 SLOT E4 | 
| Observing | 
Current orbital elements
| Inclination | 55.043° | 
| Eccentricity | 0.00007 | 
| RA ascending node | 2.747 hr | 
| Argument perigee | 23.847° | 
| Mean anomaly | 339.731° | 
| Orbital period | 751.612 min | 
| Epoch of osculation | 28 Oct 2025, 09:54 | 
Derived Quantities
| Min Altitude | 21010.6 km | 
| Mean Altitude | 21012.5 km | 
| Peak Altitude | 21014.5 km | 
Orbital History
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