Dia (moon)
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]
| 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 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.
Dia (moon) Media
Dia imaged by the Canada-France-Hawaii Telescope in December 2001. In the second frame Dia is not visible due to Jupiter's glare reducing the relative brightnesses of the stars.
References
- ↑ IAUC 7555: Satellites of Jupiter 2001 January 5 (discovery)
- ↑ 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)
- ↑ 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
- ↑ Sheppard, S. S.; Jewitt, D. C.; An abundant population of small irregular satellites around Jupiter, Nature, 423 (May 2003), pp. 261-263
- Ephemeris IAU-MPC NSES
- Mean orbital parameters NASA JPL
