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    EXPLORER 27
            Launch Details
            
                
        
                    | Launched | 28 April 1965 | 
| Flight ended | – | 
| Status | Unknown | 
| Launch site | Wallops Island, Virginia, USA | 
| Owner | United States | 
| NORAD ID | 1328 | 
| COSPAR ID | 1965-032A | 
| Observing | 
Current orbital elements
| Inclination | 41.184° | 
| Eccentricity | 0.02433 | 
| RA ascending node | 18.974 hr | 
| Argument perigee | 186.175° | 
| Mean anomaly | 173.598° | 
| Orbital period | 107.551 min | 
| Epoch of osculation | 29 Oct 2025, 10:25 | 
Derived Quantities
| Min Altitude | 938.2 km | 
| Mean Altitude | 1120.5 km | 
| Peak Altitude | 1302.8 km | 
Orbital History
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