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Spacecraft information: PROSPERO
Launch Details
| Launched | 27 October 1971 |
| Flight ended | – |
| Status | Unknown |
| Launch site | Woomera, Australia |
| Owner | United Kingdom |
| NORAD ID | 5580 |
| COSPAR ID | 1971-093A |
| Alternative names |
BLACK ARROW |
| Observing |
Current orbital elements
| Inclination | 82.039° |
| Eccentricity | 0.05038 |
| RA ascending node | 6.321 hr |
| Argument perigee | 42.950° |
| Mean anomaly | 320.987° |
| Orbital period | 102.774 min |
| Epoch of osculation | 12 Dec 2025, 07:26 |
Derived Quantities
| Min Altitude | 530.8 km |
| Mean Altitude | 897.0 km |
| Peak Altitude | 1263.1 km |
Orbital History
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