Praxidike (moon)
{{Short description|Moon of Jupiter}}
{{Infobox planet
| name = Praxidike
| image = Praxidike-Jewitt-CFHT-annotated.gif
| image_scale =
| caption = Praxidike imaged by the Canada-France-Hawaii Telescope in December 2001
| pronounced = {{IPAc-en|p|r|æ|k|ˈ|s|ɪ|d|ə|k|iː}}as 'Praxidice' in Noah Webster (1884) A Practical Dictionary of the English Language
| adjective = Praxidikean {{IPAc-en|ˌ|p|r|æ|k|s|ə|d|ə|ˈ|k|iː|ə|n}}There is also 'Praxidician' {{IPAc-en|p|r|æ|k|s|ə|ˈ|d|ɪ|ʃ|i|ə|n}}, as in the 'Praxidician goddesses' that include Praxidice, but this does not derive from the name Praxidice itself.
| named_after = Πραξιδίκη Praxidikē
| mpc_name = Jupiter XXVII
| alt_names = S/2000 J 7
| discoverer = Scott S. Sheppard et al.
| discovered = 23 November 2000
| discovery_site = Mauna Kea Obs.
| semimajor = {{val|21147000|u=km}}
| inclination = 149.0°
| eccentricity = 0.230
| arg_peri = 209.7°
| asc_node = 285.2°
| mean_anomaly = 21.8°
| satellite_of = Jupiter
| group = Ananke group
| magnitude = 21.2
| mean_diameter = {{val|7.0|0.7|u=km}}
| albedo = {{val|0.029|0.006}}
}}
Praxidike {{IPAc-en|p|r|æ|k|ˈ|s|ɪ|d|ə|k|iː}}, also known as {{nowrap|Jupiter XXVII}}, is a retrograde irregular satellite of Jupiter. It was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2000,[http://www.cbat.eps.harvard.edu/iauc/07500/07555.html IAUC 7555: Satellites of Jupiter] January 5, 2001 (discovery)[http://www.minorplanetcenter.org/mpec/K01/K01A29.html MPEC 2001-A29: S/2000 J 7, S/2000 J 8, S/2000 J 9, S/2000 J 10, S/2000 J 11] January 15, 2001 (discovery and ephemeris) and given the temporary designation {{nowrap|S/2000 J 7}}.
It was named in August 2003 after Praxidike,[http://www.cbat.eps.harvard.edu/iauc/07900/07998.html IAUC 7998: Satellites of Jupiter] 2002 October 22 (naming the moon) the Greek goddess of punishment.
Orbit
File:Praxidike-WISE.gif spacecraft in 2010]]
Praxidike orbits Jupiter at an average distance of 20,824,000 km in 609.25 days, at an inclination of 144° to the ecliptic (143° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.1840.
Praxidike belongs to the Ananke group, believed to be the remnants of a break-up of a captured heliocentric asteroid.Sheppard, S. S., Jewitt, D. C.; [http://www.ifa.hawaii.edu/~jewitt/papers/JSATS/SJ2003.pdf An Abundant Population of Small Irregular Satellites Around Jupiter] {{Webarchive|url=https://web.archive.org/web/20030805013031/http://www.ifa.hawaii.edu/~jewitt/papers/JSATS/SJ2003.pdf |date=2003-08-05 }}, Nature, Vol. 423 (May 2003), pp. 261-263Nesvorný, D.; Alvarellos, J. L. A.; Dones, L.; and Levison, H. F.; [http://www.journals.uchicago.edu/AJ/journal/issues/v126n1/202528/202528.web.pdf Orbital and Collisional Evolution of the Irregular Satellites], The Astronomical Journal, Vol. 126 (2003), pp. 398–429 With an estimated diameter of 7 km, Praxidike is the second largest member of the group after Ananke itself (assumed albedo of 0.04).Sheppard, S. S.; Jewitt, D. C.; Porco, C.;
[http://www.ifa.hawaii.edu/~jewitt/papers/JUPITER/JSP.2003.pdf Jupiter's Outer Satellites and Trojans] {{Webarchive|url=https://web.archive.org/web/20090920105416/http://www.ifa.hawaii.edu/~jewitt/papers/JUPITER/JSP.2003.pdf |date=2009-09-20 }}, in Jupiter: The Planet, Satellites and Magnetosphere, edited by Fran Bagenal, Timothy E. Dowling, and William B. McKinnon, Cambridge Planetary Science, Vol. 1, Cambridge, UK: Cambridge University Press, {{ISBN|0-521-81808-7}}, 2004, pp. 263-280
Characteristics
References
{{reflist|refs=
|display-authors = etal
|first1 = T. |last1 = Grav
|first2 = J. M. |last2 = Bauer
|first3 = A. K. |last3 = Mainzer
|first4 = J. R. |last4 = Masiero
|first5 = C. R. |last5 = Nugent
|first6 = R. M. |last6 = Cutri
|date = August 2015
|title = NEOWISE: Observations of the Irregular Satellites of Jupiter and Saturn
|journal = The Astrophysical Journal
|volume = 809
|issue = 1
|id = 3
|pages = 9
|doi = 10.1088/0004-637X/809/1/3
|bibcode = 2015ApJ...809....3G|s2cid = 5834661 |url = https://authors.library.caltech.edu/61254/1/Grav_2015.pdf }}
|title = M.P.C. 104798
|url = https://minorplanetcenter.net/iau/ECS/MPCArchive/2017/MPC_20170510.pdf
|work = Minor Planet Circular
|publisher = Minor Planet Center
|date = 10 May 2017}}
}}
- Ephemeris [http://www.minorplanetcenter.org/iau/NatSats/NaturalSatellites.html IAU-MPC NSES]
- Mean orbital parameters [http://ssd.jpl.nasa.gov/?sat_elem NASA JPL]
External links
- [https://web.archive.org/web/20060901072706/http://www.ifa.hawaii.edu/~jewitt/irregulars.html David Jewitt pages]
- [https://web.archive.org/web/20031209190431/http://www.ifa.hawaii.edu/~sheppard/satellites/urasatdata.html Scott Sheppard pages]
{{Moons of Jupiter}}
{{DEFAULTSORT:Praxidike (Moon)}}