Dia (moon)

S/2000 J 11

Discovery
Discovered by	Scott S. Sheppard et al.
Discovery date	2000
Orbital characteristics
Mean orbit radius	12.555 million km
Eccentricity	0.248
Inclination	28°
Satellite of	Jupiter
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.^[1][2]

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.^[3]

The moon is included in the Himalia group.^[4] 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

5. Ephemeris IAU-MPC NSES
6. Mean orbital parameters NASA JPL

Other websites

• David Jewitt pages
• Scott Sheppard pages