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{{Short description|Moon of Jupiter}}
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'''Praxidike''' ({{IPAc-en|p|r|æ|k|ˈ|s|ɪ|d|ɨ|k|iː}} {{respell|prak|SID|ə-kee}}; Greek: ''Πραξιδίκη''), also known as '''{{nowrap|Jupiter XXVII}}''', is a [[Prograde and retrograde motion|retrograde]] [[irregular satellite]] of [[Jupiter]]. It was discovered by a team of [[astronomer]]s from the [[University of Hawaii]] led by [[Scott S. Sheppard]] in 2000,<ref>[http://www.cbat.eps.harvard.edu/iauc/07500/07555.html IAUC 7555: ''Satellites of Jupiter''] January 5, 2001 (discovery)</ref><ref>[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)</ref> and given the [[provisional designation|temporary designation]] '''{{nowrap|S/2000 J 7}}'''.
{{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}}<ref>as 'Praxidice' in Noah Webster (1884) ''A Practical Dictionary of the English Language''</ref>
| adjective = Praxidikean {{IPAc-en|ˌ|p|r|æ|k|s|ə|d|ə|ˈ|k|iː|ə|n}}<ref>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.</ref>
| named_after = [[Praxidike|Πραξιδίκη]] ''Praxidikē''
| mpc_name = Jupiter XXVII
| alt_names = S/2000 J 7
| discovery_ref = <ref name="MPEC"/>
| discoverer = [[Scott S. Sheppard]] et al.
| discovered = 23 November 2000
| discovery_site = [[Mauna Kea Observatory|Mauna Kea Obs.]]
| orbit_ref = &thinsp;<ref>[https://sites.google.com/carnegiescience.edu/sheppard/moons/jupitermoons S.S. Sheppard (2019), Moons of Jupiter, ''Carnegie Science'', on line]</ref>
| semimajor = {{val|21147000|u=km}}
| inclination = 149.0°
| eccentricity = 0.230
| arg_peri = 209.7°
| asc_node = 285.2°
| mean_anomaly = 21.8°
| period = −609.25 days<ref name="MPC104798"/>
| satellite_of = [[Jupiter]]
| group = [[Ananke group]]
| magnitude = 21.2
| mean_diameter = {{val|7.0|0.7|u=km}}<ref name="Grav2015"/>
| albedo = {{val|0.029|0.006}}<ref name="Grav2015"/>
}}


⚫
'''Praxidike''' {{IPAc-en|p|r|æ|k|ˈ|s|ɪ|d|ə|k|iː}}, also known as '''{{nowrap|Jupiter XXVII}}''', is a [[Prograde and retrograde motion|retrograde]] [[irregular satellite]] of [[Jupiter]]. It was discovered by a team of [[astronomer]]s from the [[University of Hawaii]] led by [[Scott S. Sheppard]] in 2000,<ref>[http://www.cbat.eps.harvard.edu/iauc/07500/07555.html IAUC 7555: ''Satellites of Jupiter''] January 5, 2001 (discovery)</ref><ref name="MPEC">[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)</ref> and given the [[provisional designation|temporary designation]] '''{{nowrap|S/2000 J 7}}'''.
⚫
Praxidike [[orbit]]s Jupiter at an average distance of 20,824 [[Mega-|M]]m in 613.904 [[day]]s, at an [[inclination]] of 144° to the [[ecliptic]] (143° to Jupiter's [[equator]]), in a [[retrograde motion|retrograde]] direction and with an [[eccentricity (orbit)|eccentricity]] of 0.1840.


It was named in August 2003 after [[Praxidike]],<ref>[http://www.cbat.eps.harvard.edu/iauc/07900/07998.html IAUC 7998: ''Satellites of Jupiter''] 2002 October 22 (naming the moon)</ref> the [[Greek mythology|Greek]] [[goddess]] of [[punishment]].
It was named in August 2003 after [[Praxidike]],<ref>[http://www.cbat.eps.harvard.edu/iauc/07900/07998.html IAUC 7998: ''Satellites of Jupiter''] 2002 October 22 (naming the moon)</ref> the [[Greek mythology|Greek]] [[goddess]] of [[punishment]].


==Orbit==
⚫
Praxidike belongs to the [[Ananke group]], believed to be the remnants of a break-up of a captured heliocentric asteroid.<ref name="SheppardJewitt2003">Sheppard, S. S., [[David C. Jewitt|Jewitt, D. C.]]; [http://www.ifa.hawaii.edu/~jewitt/papers/JSATS/SJ2003.pdf ''An Abundant Population of Small Irregular Satellites Around Jupiter''], Nature, Vol. 423 (May 2003), pp. 261-263</ref><ref name="Nesvorny2003">[[David Nesvorný|Nesvorný, D.]]; [[Jose L. A. Alvarellos|Alvarellos, J. L. A.]]; [[Luke Dones|Dones, L.]]; and [[Harold F. Levison|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</ref> With an estimated diameter of 7&nbsp;km, Praxidike is the second largest member of the group after Ananke itself (assumed albedo of 0.04).<ref name="SheppardJewittPorco2004">Sheppard, S. S.; Jewitt, D. C.; [[Carolyn Porco|Porco, C.]];
[[File:Praxidike-WISE.gif|thumb|left|upright|Praxidike observed by the [[Wide-field Infrared Survey Explorer|WISE]] spacecraft in 2010]]
⚫
[http://www.ifa.hawaii.edu/~jewitt/papers/JUPITER/JSP.2003.pdf ''Jupiter's Outer Satellites and Trojans''], 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</ref>
⚫
Praxidike [[orbit]]s Jupiter at an average distance of 20,824,000 km in 609.25 [[day]]s, at an [[inclination]] of 144° to the [[ecliptic]] (143° to Jupiter's [[equator]]), in a [[retrograde motion|retrograde]] direction and with an [[eccentricity (orbit)|eccentricity]] of 0.1840.


⚫
Praxidike belongs to the [[Ananke group]], believed to be the remnants of a break-up of a captured heliocentric asteroid.<ref name="SheppardJewitt2003">Sheppard, S. S., [[David C. Jewitt|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. 261-263</ref><ref name="Nesvorny2003">[[David Nesvorný|Nesvorný, D.]]; [[Jose L. A. Alvarellos|Alvarellos, J. L. A.]]; [[Luke Dones|Dones, L.]]; and [[Harold F. Levison|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</ref> With an estimated diameter of 7&nbsp;km, Praxidike is the second largest member of the group after Ananke itself (assumed albedo of 0.04).<ref name="SheppardJewittPorco2004">Sheppard, S. S.; Jewitt, D. C.; [[Carolyn Porco|Porco, C.]];
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The satellite appears grey ([[color index|colour indices]] B-V=0.77, R-V= 0.34), typical of [[C-type asteroid]]s.<ref name="Grav2003">[[Tommy Grav|Grav, T.]]; [[Matthew J. Holman|Holman, M. J.]]; [[Brett J. Gladman|Gladman, B. J.]]; [[Kaare Aksnes|Aksnes, K.]]; [http://arxiv.org/abs/astro-ph/0301016 ''Photometric Survey of the Irregular Satellites''], Icarus, Vol. 166 (2003), pp. 33-45</ref>
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[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</ref>

==Characteristics==
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The satellite appears grey ([[color index|colour indices]] B-V=0.77, R-V= 0.34), typical of [[C-type asteroid]]s.<ref name="Grav2003">[[Tommy Grav|Grav, T.]]; [[Matthew J. Holman|Holman, M. J.]]; [[Brett J. Gladman|Gladman, B. J.]]; [[Kaare Aksnes|Aksnes, K.]]; [https://arxiv.org/abs/astro-ph/0301016 ''Photometric Survey of the Irregular Satellites''], Icarus, Vol. 166 (2003), pp. 33-45</ref>
{{clear}}


==References==
==References==
{{reflist}}
{{reflist|refs=

⚫
#<li value="8">Ephemeris [http://www.minorplanetcenter.org/iau/NatSats/NaturalSatellites.html IAU-MPC NSES]
<ref name="Grav2015">{{cite journal
⚫
#Mean orbital parameters [http://ssd.jpl.nasa.gov/?sat_elem NASA JPL]
|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 }}</ref>

<ref name="MPC104798">{{cite web
|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}}</ref>

}}
⚫
* 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==
==External links==
*[http://www.ifa.hawaii.edu/~jewitt/irregulars.html David Jewitt pages]
*[https://web.archive.org/web/20060901072706/http://www.ifa.hawaii.edu/~jewitt/irregulars.html David Jewitt pages]
*[http://www.ifa.hawaii.edu/~sheppard/satellites/urasatdata.html Scott Sheppard pages]
*[https://web.archive.org/web/20031209190431/http://www.ifa.hawaii.edu/~sheppard/satellites/urasatdata.html Scott Sheppard pages]


{{Moons of Jupiter}}
{{Moons of Jupiter}}
Line 26: Line 87:
[[Category:Irregular satellites]]
[[Category:Irregular satellites]]
[[Category:Discoveries by Scott S. Sheppard]]
[[Category:Discoveries by Scott S. Sheppard]]
[[Category:Astronomical objects discovered in 2000]]
[[Category:Astronomical objects discovered in 2000|20001123]]
[[Category:Moons with a retrograde orbit]]

Latest revision as of 21:17, 14 January 2024

Praxidike
Praxidike imaged by the Canada-France-Hawaii Telescope in December 2001
Discovery[1]
Discovered byScott S. Sheppard et al.
Discovery siteMauna Kea Obs.
Discovery date23 November 2000
Designations
Designation
Jupiter XXVII
Pronunciation/prækˈsɪdəkiː/[2]
Named after
Πραξιδίκη Praxidikē
S/2000 J 7
AdjectivesPraxidikean /ˌpræksədəˈkiːən/[3]
Orbital characteristics [4]
21147000 km
Eccentricity0.230
−609.25 days[5]
21.8°
Inclination149.0°
285.2°
209.7°
Satellite ofJupiter
GroupAnanke group
Physical characteristics
7.0±0.7 km[6]
Albedo0.029±0.006[6]
21.2

Praxidike /prækˈsɪdəkiː/, also known as 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,[7][1] and given the temporary designation S/2000 J 7.

It was named in August 2003 after Praxidike,[8] the Greek goddess of punishment.

Orbit

[edit]
Praxidike observed by the WISE 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.[9][10] With an estimated diameter of 7 km, Praxidike is the second largest member of the group after Ananke itself (assumed albedo of 0.04).[11]

Characteristics

[edit]

The satellite appears grey (colour indices B-V=0.77, R-V= 0.34), typical of C-type asteroids.[12]

References

[edit]
  1. ^ a b 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)
  2. ^ as 'Praxidice' in Noah Webster (1884) A Practical Dictionary of the English Language
  3. ^ There is also 'Praxidician' /præksəˈdɪʃiən/, as in the 'Praxidician goddesses' that include Praxidice, but this does not derive from the name Praxidice itself.
  4. ^ S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line
  5. ^ "M.P.C. 104798" (PDF). Minor Planet Circular. Minor Planet Center. 10 May 2017.
  6. ^ a b Grav, T.; Bauer, J. M.; Mainzer, A. K.; Masiero, J. R.; Nugent, C. R.; Cutri, R. M.; et al. (August 2015). "NEOWISE: Observations of the Irregular Satellites of Jupiter and Saturn" (PDF). The Astrophysical Journal. 809 (1): 9. Bibcode:2015ApJ...809....3G. doi:10.1088/0004-637X/809/1/3. S2CID 5834661. 3.
  7. ^ IAUC 7555: Satellites of Jupiter January 5, 2001 (discovery)
  8. ^ IAUC 7998: Satellites of Jupiter 2002 October 22 (naming the moon)
  9. ^ Sheppard, S. S., Jewitt, D. C.; An Abundant Population of Small Irregular Satellites Around Jupiter Archived 2003-08-05 at the Wayback Machine, Nature, Vol. 423 (May 2003), pp. 261-263
  10. ^ Nesvorný, D.; Alvarellos, J. L. A.; Dones, L.; and Levison, H. F.; Orbital and Collisional Evolution of the Irregular Satellites, The Astronomical Journal, Vol. 126 (2003), pp. 398–429
  11. ^ Sheppard, S. S.; Jewitt, D. C.; Porco, C.; Jupiter's Outer Satellites and Trojans Archived 2009-09-20 at the Wayback Machine, 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
  12. ^ Grav, T.; Holman, M. J.; Gladman, B. J.; Aksnes, K.; Photometric Survey of the Irregular Satellites, Icarus, Vol. 166 (2003), pp. 33-45
[edit]
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