|Discovered by||Scott S. Sheppard, David C. Jewitt, Yanga R. Fernández, and Eugene A. Magnier|
|Discovery site||Mauna Kea Obs.|
|Discovery date||5 December 2000|
11 September 2012 (rediscovery)
|S/2000 J 11|
|Orbital characteristics |
Dia //, also known as Jupiter LIII, is a prograde irregular satellite of Jupiter. Provisionally known as S/2000 J 11, it received its name on March 7, 2015. It is named after Dia, daughter of Deioneus (or Eioneus), wife of Ixion. According to Homer, she was seduced by Zeus in stallion form; Pirithous was the issue.
Dia is thought to be about 4 kilometres in diameter. It orbits Jupiter at an average distance of 12 million km in 274 days, at an inclination of 28° (to Jupiter's equator), and with an eccentricity of 0.21.
Initial observations were not followed up, and Dia was not observed for more than a decade after 2000. This apparent disappearance led some astronomers to consider the moon lost. One theory was that it had crashed into Himalia, creating a faint ring around Jupiter. However, it was finally recovered in observations made in 2010 and 2011.
- Noah Webster (1884) A Practical Dictionary of the English Language
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- Sheppard, S. S.; Jewitt, D. C.; Porco, C.; Jupiter's outer satellites and Trojans Archived June 14, 2007, at the Wayback Machine, in Jupiter: The planet, satellites and magnetosphere, edited by Fran Bagenal, Timothy E. Dowling, William B. McKinnon, Cambridge Planetary Science, Vol. 1, Cambridge, UK: Cambridge University Press, ISBN 0-521-81808-7, 2004, pp. 263-280
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