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Harpalyke (moon)

Harpalyke
Discovery
Discovered byScott S. Sheppard
Discovery date2000
Designations
Designation
Jupiter XXII
Pronunciation/hɑːrˈpælɪk/[1]
Named after
Ἁρπαλύκη Harpălykē
S/2000 J 5
AdjectivesHarpalykean /hɑːrpəlɪˈkən/
Orbital characteristics[2]
21105000 km
Eccentricity0.226
−623.3 days
120.4°
Inclination148.6°
40.0°
129.9°
Satellite ofJupiter
GroupAnanke group
Physical characteristics
Mean diameter
4 km
22.2

Harpalyke /hɑːrˈpælɪk/, also known as Jupiter XXII, 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, and given the temporary designation S/2000 J 5.[3][4] In August 2003, the moon was named[5] after Harpalyke, the incestuous daughter of Clymenus, who in some accounts was also a lover of Zeus (Jupiter).

Harpalyke belongs to the Ananke group, believed to be the remnants of a break-up of a captured heliocentric asteroid.[6][7] It is about 4 kilometres in diameter[8] and appears grey (color index R-V=0.43), similar to C-type asteroids.[9] The satellite orbits Jupiter at an average distance of 21,064,000 km in 624.542 days, at an inclination of 147° to the ecliptic (147° to Jupiter's equator) with an eccentricity of 0.2441.

References

  1. ^ as 'Harpalyce', 'Harpalycus' in Noah Webster (1884) A Practical Dictionary of the English Language
  2. ^ S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line
  3. ^ IAUC 7555: Satellites of Jupiter January 5, 2001 (discovery)
  4. ^ MPEC 2001-A28: S/2000 J 2, S/2000 J 3, S/2000 J 4, S/2000 J 5, S/2000 J 6 January 5, 2001 (discovery and ephemeris)
  5. ^ IAUC 7998: Satellites of Jupiter 2002 October 22 (naming the moon)
  6. ^ Sheppard, S. S.; and Jewitt, D. C.; An Abundant Population of Small Irregular Satellites Around Jupiter, Nature, Vol. 423 (May 2003), pp. 261-263
  7. ^ 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
  8. ^ Sheppard, S. S.; Jewitt, D. C.; and Porco, C. C.; 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
  9. ^ Grav, T.; Holman, M. J.; Gladman, B. J.; and Aksnes, K.; Photometric Survey of the Irregular Satellites, Icarus, Vol. 166 (2003), pp. 33-45
  1. Ephemeris IAU-MPC NSES
  2. Mean orbital parameters NASA JPL

External links