Spacecraft information: HIPPARCOS
| Launched | 7 August 1989 |
| Flight ended | – |
| Status | Non-operational |
| Launch site | Europe's Spaceport, Kourou, French Guiana |
| Owner | European Space Agency |
| NORAD ID | 20169 |
| COSPAR ID | 1989-062B |
| Observing |
Current orbital elements
| Inclination | 7.396° |
| Eccentricity | 0.71893 |
| RA ascending node | 23.453 hr |
| Argument perigee | 279.565° |
| Mean anomaly | 12.570° |
| Orbital period | 636.007 min |
| Epoch of osculation | 25 Mar 2026, 01:34 |
Derived Quantities
| Min Altitude | 514.6 km |
| Mean Altitude | 18127.2 km |
| Peak Altitude | 35739.8 km |
Orbital History
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