Dia (moon)

S/2000 J 11
22 Sept 2006
Discovery
Discovered byScott S. Sheppard et al.
Discovery date2000
Orbital characteristics
Mean orbit radius
12.555 million km
Eccentricity0.248
Inclination28°
Satellite ofJupiter
Physical characteristics
Mean radius
~2 km

Dia (S/2000 J 11) ls the second-outermost prograde non-spherical moon of Jupiter. It was found by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2000.

Dia is about 4 kilometres in diameter, and orbits Jupiter at an average distance of 12,555,000 km in 287 days, at an inclination of 28° (to Jupiter's equator), and with an orbital eccentricity of 0.248.

The moon is included in the Himalia group. After discovery it was lost for ten years because the orbit was poorly known. Recovery allowed much better precision.

References

  1. ↑ IAUC 7555: Satellites of Jupiter 2001 January 5 (discovery)
  2. ↑ MPEC 2001-A29: S/2000 J 7, S/2000 J 8, S/2000 J 9, S/2000 J 10, S/2000 J 11 2001 January 15 (discovery and ephemeris)
  3. ↑ Sheppard, S. S.; Jewitt, D. C.; Porco, C.; Jupiter's outer satellites and Trojans, 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
  4. ↑ Sheppard, S. S.; Jewitt, D. C.; An abundant population of small irregular satellites around Jupiter, Nature, 423 (May 2003), pp. 261-263
  2. Ephemeris IAU-MPC NSES
  3. Mean orbital parameters NASA JPL

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