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 (sidereal)	+287.0 days
Mean anomaly	169.9°
Inclination	28.23°
Longitude of ascending node	290.9°
Argument of perihelion	178.0°
Satellite of	Jupiter
Group	Himalia group
Physical characteristics
Mean diameter	4 km
Apparent magnitude	22.4

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 Archived August 13, 2006, at the Wayback Machine, Nature, 423 (May 2003), pp. 261–263
^ 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
^ ^a ^b Williams, Gareth V. (September 11, 2012). "MPEC 2012-R22 : S/2000 J 11". Minor Planet Center. Retrieved September 11, 2012.
^ Daniel W. E. Green (January 5, 2001). "IAUC 7555: Satellites of Jupiter". International Astronomical Union.
^ 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.
^ "FAQ: Why don't you have Jovian satellite S/2000 J11 in your system?". JPL Solar System Dynamics. Retrieved February 13, 2011.
^ "Lunar marriage may have given Jupiter a ring", New Scientist, March 20, 2010, p. 16.(subscription required)

External links

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

[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 Archived August 13, 2006, at the Wayback Machine, Nature, 423 (May 2003), pp. 261–263

[SheppardJewittPorco2004-5] 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

[MPEC2012-R22-6] Williams, Gareth V. (September 11, 2012). "MPEC 2012-R22 : S/2000 J 11". Minor Planet Center. Retrieved September 11, 2012.

[7] Daniel W. E. Green (January 5, 2001). "IAUC 7555: Satellites of Jupiter". International Astronomical Union.

[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.

[JPL-SSD-9] "FAQ: Why don't you have Jovian satellite S/2000 J11 in your system?". JPL Solar System Dynamics. Retrieved February 13, 2011.

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

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v t e Moons of Jupiter
Listed in increasing approximate distance from Jupiter
Inner moons	Metis Adrastea Amalthea Thebe
Galilean moons	Io Europa Ganymede Callisto
Themisto	Themisto
Himalia group (9)	Leda Ersa S/2018 J 2 Himalia Pandia Lysithea Elara S/2011 J 3 Dia
Carpo group (2)	S/2018 J 4 Carpo
Valetudo	Valetudo
Ananke group (26)	Euporie Jupiter LV Eupheme S/2021 J 3 Jupiter LII Jupiter LIV Mneme Euanthe S/2003 J 16 Harpalyke Orthosie S/2022 J 3 Helike S/2021 J 2 Praxidike Jupiter LXIV S/2021 J 1 S/2003 J 12 Jupiter LXVIII Thelxinoe Thyone S/2003 J 2 Ananke Iocaste Hermippe Jupiter LXX
Carme group (30)	S/2022 J 1 S/2022 J 2 S/2016 J 3 Pasithee Jupiter LXIX S/2021 J 6 S/2003 J 24 Chaldene Jupiter LXIII Isonoe S/2021 J 4 Kallichore Erinome Kale Eirene Aitne Eukelade Arche Taygete Jupiter LXXII Carme Herse Jupiter LXI Jupiter LI S/2003 J 9 Jupiter LXVI Kalyke S/2018 J 3 S/2021 J 5 S/2003 J 10
Pasiphae group (18)	Philophrosyne Eurydome Jupiter LVI S/2003 J 4 S/2016 J 4 Jupiter LXVII Hegemone Pasiphae Sponde Megaclite Cyllene Sinope Jupiter LIX Aoede Autonoe Callirrhoe S/2003 J 23 Kore
See also	Rings of Jupiter Jupiter's moons in fiction
Category