Browse satellite catalog
         |
        
            Map of low-earth satellites
         |
        
            Satellites above your horizon
         |
        
            3D map of low-earth satellites
        
    
    STEX
            Launch Details
            
                
        
                    | Launched | 2 October 1998 | 
| Flight ended | – | 
| Status | Non-operational | 
| Launch site | Air Force Western Test Range, California, USA | 
| Owner | United States | 
| NORAD ID | 25489 | 
| COSPAR ID | 1998-055A | 
| Alternative names | 
                                                            SPACE TECHNOLOGY EXPERIMENT                                 | 
                    
| Observing | 
Current orbital elements
| Inclination | 84.979° | 
| Eccentricity | 0.00109 | 
| RA ascending node | 7.381 hr | 
| Argument perigee | 90.075° | 
| Mean anomaly | 270.171° | 
| Orbital period | 99.205 min | 
| Epoch of osculation | 02 Nov 2025, 11:29 | 
Derived Quantities
| Min Altitude | 720.0 km | 
| Mean Altitude | 727.8 km | 
| Peak Altitude | 735.5 km | 
Orbital History
Drag the graphs below left or right to change the time range, or use your scroll wheel to zoom in or out.