Key facts
- Discovered by
- John J. Kavelaars Brett J. Gladman Matthew J. Holman Jean-Marc Petit Hans Scholl
- Discovery date
- 18 July 1999
- Designation
- Uranus XVIII
- Pronunciation
- / ˈ p r ɒ s p ɛ r oʊ /
- Adjectives
- Prosperonian / p r ɒ s p ɛ ˈ r oʊ n i ə n / , Prosperian / p r ɒ ˈ s p ɪər i ə n /
- Mean orbit radius
- 16,256,000 km
- Orbital period sidereal
- 1978.29 d
- Inclination
- 152° (to the ecliptic )
- Satellite of
- Uranus
- Mean diameter
- 50 km , <50 km
- Synodic rotation period
- 7.145 ± 0.092 h
- Albedo
- 0.04 (Assumed) , >0,03
- Apparent magnitude
- 23,2
- Absolute magnitude h
- 10,6
via Wikipedia infobox
Article
Prospero, also known as Uranus XVIII, is one of the largest retrograde irregular satellites of Uranus.
Animation of discovery images to show Prospero's motion among background stars