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Prospero (moon) : ウィキペディア英語版 | Prospero (moon)
Prospero ( ) is a relatively small retrograde irregular satellite of Uranus discovered on 18 July 1999 by the astrophysicist Matthew Holman and his team, and given the provisional designation S/1999 U 3. Confirmed as Uranus XVIII it was named after the sorcerer Prospero in William Shakespeare's play ''The Tempest''. The orbital parameters suggest that it may belong to the same dynamic cluster as Sycorax and Setebos, suggesting common origin.〔 However, this suggestion does not appear to be supported by the observed colours. The satellite appears neutral (grey) in visible light (colour indices B-V=0.80, R-V=0.39), similar to Setebos but different from Sycorax (which is ''light red''). == See also ==
* Uranus' natural satellites * Irregular satellites
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