Spacecraft information: SSETI EXPRESS
| Launched | 26 October 2005 |
| Flight ended | – |
| Status | Non-operational |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | European Space Agency |
| NORAD ID | 28894 |
| COSPAR ID | 2005-043E |
| Alternative names |
XO-53 |
| Observing |
Current orbital elements
| Inclination | 98.314° |
| Eccentricity | 0.00170 |
| RA ascending node | 23.990 hr |
| Argument perigee | 117.178° |
| Mean anomaly | 243.116° |
| Orbital period | 98.265 min |
| Epoch of osculation | 07 Aug 2026, 07:47 |
Derived Quantities
| Min Altitude | 670.8 km |
| Mean Altitude | 682.9 km |
| Peak Altitude | 694.9 km |
Orbital History
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