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Spacecraft information: SKYNET 4A
Launch Details
| Launched | 31 December 1989 |
| Flight ended | – |
| Status | Non-operational |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United Kingdom |
| NORAD ID | 20401 |
| COSPAR ID | 1990-001A |
| Observing |
Current orbital elements
| Inclination | 12.492° |
| Eccentricity | 0.00131 |
| RA ascending node | 23.300 hr |
| Argument perigee | 313.840° |
| Mean anomaly | 55.462° |
| Orbital period | 1454.584 min |
| Epoch of osculation | 11 Jul 2026, 09:46 |
Derived Quantities
| Min Altitude | 36099.0 km |
| Mean Altitude | 36154.8 km |
| Peak Altitude | 36210.6 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.