| Proper Name | Prospero | | Designation | Uranus XVIII | | Primary Planet | Uranus | | Family / Class | Retrograde irregular moons | | Orbital Period | 5 years, 152 days (retrograde) | | Distance from Uranus | Semi-Major Axis: 16,277,000 km (0.11 AU)
Periapsis: 9,042,000 km
Apoapsis: 23,512,000 km (0.16 AU)
| | Eccentricity | 0.4445 | | Rotation Period | Not known | | Mean Diameter | c. 50 km | | Notes | Prospero, named for the magician at the centre of Shakespeare's The Tempest, is a small retrogade satellite of Uranus (that is, it follows its orbital path in the opposite direction to Uranus' rotation, suggesting that it was captured by the ice giant planet after it had formed). |
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