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    GREB
            Launch Details
            
                
        
                    | Launched | 10 January 1964 | 
| Flight ended | – | 
| Status | Unknown | 
| Launch site | Air Force Western Test Range, California, USA | 
| Owner | United States | 
| NORAD ID | 731 | 
| COSPAR ID | 1964-001E | 
| Observing | 
Current orbital elements
| Inclination | 69.908° | 
| Eccentricity | 0.00159 | 
| RA ascending node | 2.841 hr | 
| Argument perigee | 316.005° | 
| Mean anomaly | 43.979° | 
| Orbital period | 103.132 min | 
| Epoch of osculation | 29 Oct 2025, 13:00 | 
Derived Quantities
| Min Altitude | 902.3 km | 
| Mean Altitude | 913.9 km | 
| Peak Altitude | 925.5 km | 
Orbital History
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