Spacecraft information: SKYNET 4B
| Launched | 10 December 1988 |
| Flight ended | – |
| Status | Non-operational |
| Launch site | Europe's Spaceport, Kourou, French Guiana |
| Owner | United Kingdom |
| NORAD ID | 19687 |
| COSPAR ID | 1988-109A |
| Observing |
Current orbital elements
| Inclination | 13.126° |
| Eccentricity | 0.00045 |
| RA ascending node | 22.473 hr |
| Argument perigee | 322.607° |
| Mean anomaly | 28.595° |
| Orbital period | 1444.813 min |
| Epoch of osculation | 21 May 2026, 14:08 |
Derived Quantities
| Min Altitude | 35945.3 km |
| Mean Altitude | 35964.2 km |
| Peak Altitude | 35983.0 km |
Launched alongside
ASTRA 1A ARIANE 44LP R/B ARIANE DEB ARIANE 44LP DEB ARIANE 44LP DEB ARIANE 44LP DEB ARIANE 44LP DEB ARIANE 44LP DEB ARIANE 44LP DEB ARIANE 44LP DEB ARIANE 44LP DEB ARIANE 44LP DEB ARIANE 44LP DEB ARIANE 44LP DEB ARIANE 44LP DEB ARIANE 44LP DEB ARIANE 44LP DEB ARIANE 44LP DEB ARIANE 44LP DEB ARIANE 44LP DEB ARIANE 44LP DEBOrbital History
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