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Ariel
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Information About

Ariel (moon)




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Planet Information

  Name Ariel
  Caption Click image for description
  Bgcolour #a0ffa0
  Discovery yes
  Discoverer William Lassell
  Discovered October 24 , 1851
  Semimajor 191,020 Km
  Mean Orbit Radius 190,900 km
  Eccentricity 00012
  Period 2520 D
  Inclination 0260° (to Uranus' equator)
  Satellite Of Uranus
  Physical Characteristics yes
  Mean Radius 5789 km (00908 Earths)
  Dimensions 11622 &times 11558 &times 11554 km
  Surface Area 4,211,300 Km&2
  Volume 812,600,000 Km³
  Mass 135 Kg (226 Earths)
  Density 167 G / Cm³
  Surface Grav 027 M/s<sup>2</sup>
  Escape Velocity 056 km/s
  Rotation Synchronous
  Albedo 039
  Single Temperature ~58 K


Ariel ''(air'-ee-əl,'' IPA ) is a Moon of Uranus discovered on 24 October 1851 by William Lassell . It was discovered at the same time as Umbriel .


NAME

Ariel is named after the leading Sylph in Alexander Pope's poem '' Rape Of The Lock ''. It is also the name of the spirit who serves Prospero in Shakespeare's '' Tempest ''.

The name "Ariel" and the names of all four satellites of Uranus then known were suggested by naming scheme for the seven then-known satellites of Saturn and had named his newly-discovered eighth satellite Hyperion in accordance with Herschel's naming scheme in 1848 . The adjectival form of the name is ''Arielian''.

It is also designated Uranus I.


PHYSICAL CHARACTERISTICS

See Also: List of geological features on Ariel


The first and so far only close-up observations of Ariel were made by the '', only the southern hemisphere was photographed.

Ariel's composition is roughly 70% ices (water ice, carbon dioxide ice, and possibly , at only 78 km across, and shows signs of deformation since its formation. ''Voyager 2'' also observed a network of Faults , Canyon s, and icy outflows running along Ariel's mid-southern latitudes, breaking up the cratered plains region. The canyons probably represent Graben s formed by Extensional Fault ing. Smooth material and grooves are often seen running down length of Ariel's valley networks, suggested that some canyon floors have been covered in warm ice extruded from Ariel's interior.

Official names have been given to the following Geological Feature types on Ariel:


TRIVIA


  • On July 26 , 2006 , the Hubble Space Telescope captured a rare transit made by Ariel across the face of Uranus, during which the satellite cast a shadow that could be seen on the Uranian cloudtops. Such events are rare and only occur around Equinox es, as the planet's rotation axis is tilted 98° to its orbital plane.



SEE ALSO



NOTES AND REFERENCES




EXTERNAL LINKS