Dia (Moon)

Dia
Discovery
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)
Designations
Designation	Jupiter LIII
Pronunciation	/ˈdaɪ.ə/
Named after	Δῖα Dīa
Alternative names	S/2000 J 11
Adjectives	Dian /ˈdaɪ.ən/
Orbital characteristics
Semi-major axis	12118000 km
Eccentricity	0.211
Orbital period	+287.0 days
Mean anomaly	169.9°
Inclination	28.23°
Longitude of ascending node	290.9°
\|{{{apsis}}}\|helion}}	178.0°
Satellite of	Jupiter
Group	Himalia group
Physical characteristics
Mean diameter	4 km
Apparent magnitude	22.4

Short description: Outer moon of Jupiter

Dia /ˈdaɪ.ə/, 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.^[3] 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.

The satellite is one of several known small bodies in the Himalia group.^[4]

Dia is thought to be about 4 kilometres in diameter.^[5] 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.^[6]

Observational history

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.

Dia was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2000 with an observation arc of 26 days.^[7]^[8]

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.^[9] One theory was that it had crashed into Himalia, creating a faint ring around Jupiter.^[10] However, it was finally recovered in observations made in 2010 and 2011.^[6]

References

↑ Noah Webster (1884) A Practical Dictionary of the English Language
↑ S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line
↑ CBET (Central Bureau Electronic Telegram) 4075: 20150307: Satellites of Jupiter, March 7, 2015
↑ Sheppard, S. S.; Jewitt, D. C.; An abundant population of small irregular satellites around Jupiter , Nature, 423 (May 2003), pp. 261–263
↑ 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
↑ ^6.0 ^6.1 Williams, Gareth V. (2012-09-11). "MPEC 2012-R22 : S/2000 J 11". Minor Planet Center. http://www.minorplanetcenter.net/mpec/K12/K12R22.html.
↑ Daniel W. E. Green (January 5, 2001). "IAUC 7555: Satellites of Jupiter". International Astronomical Union. http://www.cbat.eps.harvard.edu/iauc/07500/07555.html.
↑ Brian G. Marsden (January 15, 2001). "MPEC 2001-A29: S/2000 J 7, S/2000 J 8, S/2000 J 9, S/2000 J 10, S/2000 J 11". International Astronomical Union Minor Planet Center. http://www.minorplanetcenter.org/mpec/K01/K01A29.html.
↑ "FAQ: Why don't you have Jovian satellite S/2000 J11 in your system?". JPL Solar System Dynamics. http://ssd.jpl.nasa.gov/?faq#A07.
↑ "Lunar marriage may have given Jupiter a ring", New Scientist, March 20, 2010, p. 16.(Subscription content?)

External links

Natural Satellites Ephemeris Service Minor Planet Center
Planetary Satellite Mean Orbital Parameters NASA JPL
Scott Sheppard pages
David Jewitt pages

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[1] Noah Webster (1884) A Practical Dictionary of the English Language

[2] S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line

[CBET4075-3] CBET (Central Bureau Electronic Telegram) 4075: 20150307: Satellites of Jupiter, March 7, 2015

[SheppardJewitt2003-4] Sheppard, S. S.; Jewitt, D. C.; An abundant population of small irregular satellites around Jupiter , Nature, 423 (May 2003), pp. 261–263

[SheppardJewittPorco2004-5] 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

[MPEC2012-R22-6] 6.0 ^6.1 Williams, Gareth V. (2012-09-11). "MPEC 2012-R22 : S/2000 J 11". Minor Planet Center. http://www.minorplanetcenter.net/mpec/K12/K12R22.html.

[7] Daniel W. E. Green (January 5, 2001). "IAUC 7555: Satellites of Jupiter". International Astronomical Union. http://www.cbat.eps.harvard.edu/iauc/07500/07555.html.

[8] Brian G. Marsden (January 15, 2001). "MPEC 2001-A29: S/2000 J 7, S/2000 J 8, S/2000 J 9, S/2000 J 10, S/2000 J 11". International Astronomical Union Minor Planet Center. http://www.minorplanetcenter.org/mpec/K01/K01A29.html.

[JPL-SSD-9] "FAQ: Why don't you have Jovian satellite S/2000 J11 in your system?". JPL Solar System Dynamics. http://ssd.jpl.nasa.gov/?faq#A07.

[10] "Lunar marriage may have given Jupiter a ring", New Scientist, March 20, 2010, p. 16.(Subscription content?)

v t e Moons of Jupiter
Listed in approximately increasing distance from Jupiter. Provisional designations in italics.
Inner moons	Metis Adrastea Amalthea Thebe
Galilean moons	Io Europa Ganymede Callisto
Themisto group	Themisto
Himalia group	Leda Himalia Ersa Pandia Lysithea Elara Dia
Carpo group	Carpo
Valetudo group	Valetudo
Ananke group	S/2003 J 12(?) Euporie Eupheme Jupiter LV Jupiter LII Thelxinoe Euanthe Helike Orthosie Jupiter LXVIII Jupiter LIV Jupiter LXIV Iocaste S/2003 J 16(?) Praxidike Harpalyke Mneme Hermippe Thyone Jupiter LXX Ananke
Carme group	Jupiter LXXII Herse Aitne Kale Taygete Jupiter LXI Chaldene S/2003 J 10(?) Erinome Kallichore Jupiter LXVI Jupiter LXIX Kalyke Carme Jupiter LXIII Pasithee Jupiter LI Eukelade Arche Isonoe S/2003 J 9(?) Eirene
Pasiphae group	Jupiter LXVII Philophrosyne S/2003 J 23(?) Aoede Callirrhoe Eurydome Kore Cyllene Jupiter LVI Jupiter LIX S/2003 J 4(?) Pasiphae Hegemone Sinope Sponde Autonoe Megaclite S/2003 J 2(?)
Rings of Jupiter In fiction