Prospero (moon) facts for kids

Kids Encyclopedia Facts
Prospero discovery image
Discovery image of Prospero.
Discovered by
  • John J. Kavelaars
  • Brett J. Gladman
  • Matthew J. Holman
  • Jean-Marc Petit
  • Hans Scholl
Discovery date 18 July 1999
Adjective Prosperonian, Prosperian
Avgdistance from the center of its orbital path 16,256,000 km
How long it takes to complete an orbit 1978.29 d
Angle above the reference plane
152° (to the ecliptic)
What it orbits Uranus
Size and other qualities
Average radius 25 km (estimate)
Surface area ~8000 km² (estimate)
Volume ~65,000 km³ (estimate)
Mass ~8.5×1016 kg (estimate)
Average density ~1.3 g/cm³ (assumed)
Surface gravity ~0.0063 m/s² (estimate)
Escape velocity ~0.021 km/s (estimate)
Rotation period ?
Angle at which it turns
(in relation to its orbit)
How much light it reflects 0.04 (assumed)
Avg. surface temp. ~65 K (estimate)

Prospero is a small retrograde non-spherical moon of Uranus found on 1999-07-18 by the astrophysicist Matthew Holman and his team, and given 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, together with Sycorax and Setebos to the same dynamic cluster, suggesting common origin. However, this suggestion does not appear to be supported by the observed colours. The moon appears grey in the visible light , similar to Setebos but different from Sycorax (which is light red).

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Prospero (moon) Facts for Kids. Kiddle Encyclopedia.