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Spacecraft information: UOSAT 4
Launch Details
| Launched | 21 January 1990 |
| Flight ended | – |
| Status | Non-operational |
| Launch site | Europe's Spaceport, Kourou, French Guiana |
| Owner | United Kingdom |
| NORAD ID | 20438 |
| COSPAR ID | 1990-005C |
| Alternative names |
UO-15 |
| Observing |
Current orbital elements
| Inclination | 98.798° |
| Eccentricity | 0.00088 |
| RA ascending node | 7.931 hr |
| Argument perigee | 300.708° |
| Mean anomaly | 223.080° |
| Orbital period | 100.580 min |
| Epoch of osculation | 04 Mar 2026, 15:41 |
Derived Quantities
| Min Altitude | 786.9 km |
| Mean Altitude | 793.2 km |
| Peak Altitude | 799.5 km |
Orbital History
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