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Prospero
The 25th moon of Uranus in order from the planet. Prospero was discovered in 1999, together with Setebos and Stephano, by Brett Gladman, Matthew Holman, and J. J. Kavelaars using the Canada-France-Hawaii Telescope. It is named after the sorcerer in Shakespeare's play The Tempest and is also known as Uranus XVIII. Prospero is an irregular moon with a highly inclined, retrograde orbit.
| discovery | 1999, by Gladman, Holman, Kavelaars |
| semimajor axis | 16,243,000 km (10,095,000 miles) |
| diameter | 25 km (16 miles) |
| orbital period | 1,977 days (5.42 yr) |
| orbital eccentricity | 0.443 |
| orbital inclination | 151.9° |
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