Spacecraft information: GREB
| 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 | 69.904° |
| Eccentricity | 0.00124 |
| RA ascending node | 6.514 hr |
| Argument perigee | 153.711° |
| Mean anomaly | 206.463° |
| Orbital period | 103.130 min |
| Epoch of osculation | 20 Mar 2026, 10:55 |
Derived Quantities
| Min Altitude | 904.8 km |
| Mean Altitude | 913.8 km |
| Peak Altitude | 922.8 km |
Orbital History
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