Kalyke /ˈkælək/, also known as Jupiter XXIII, 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 2.[6][1]

Kalyke imaged by the Canada-France-Hawaii Telescope in December 2001
Discovery [1]
Discovered byScott S. Sheppard
David C. Jewitt
Yanga R. Fernandez
Eugene A. Magnier
Discovery siteMauna Kea Observatory
Discovery date23 November 2000
Jupiter XXIII
Named after
Καλύκη Kalykē
S/2000 J 2
AdjectivesKalykean /kæləˈkən/
Orbital characteristics[3]
Epoch 27 April 2019 (JD 2458600.5)
Observation arc16.34 yr (5,967 days)
0.1614179 AU (24,147,770 km)
–766.61 d
0° 28m 10.57s / day
Inclination165.93730° (to ecliptic)
Satellite ofJupiter
GroupCarme group
Physical characteristics
Mean diameter
6.9±1.3 km[4]

From infrared thermal measurements by the WISE spacecraft, Kalyke's albedo is measured at 2.9%, corresponding to a diameter of 6.9 kilometres.[4] It orbits Jupiter at an average distance of 23,181,000 km in 766.61 days, at an inclination of 166° to the ecliptic (165° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.2140.

It was named in October 2002 after the Greek mythological figure Kalyke or Calyce.[7]

Kalyke observed by the WISE spacecraft in 2010

It belongs to the Carme group, made up of irregular retrograde moons orbiting Jupiter at a distance ranging between 23 and 24 Gm and at an inclination of about 165°.


  1. ^ a b MPEC 2001-A28: S/2000 J 2, S/2000 J 3, S/2000 J 4, S/2000 J 5, S/2000 J 6 2001 January 5 (discovery and ephemeris)
  2. ^ as 'Calyce' in Noah Webster (1884) A Practical Dictionary of the English Language
  3. ^ a b "M.P.C. 115890" (PDF). Minor Planet Circular. Minor Planet Center. 27 August 2019.
  4. ^ a b c 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". The Astrophysical Journal. 809 (1): 9. arXiv:1505.07820. Bibcode:2015ApJ...809....3G. doi:10.1088/0004-637X/809/1/3. S2CID 5834661. 3.
  5. ^ Sheppard, Scott. "Scott S. Sheppard - Jupiter Moons". Department of Terrestrial Magnetism. Carnegie Institution for Science. Retrieved 26 November 2020.
  6. ^ IAUC 7555: Satellites of Jupiter Archived 2002-09-16 at the Wayback Machine 2001 January 5 (discovery)
  7. ^ IAUC 7998: Satellites of Jupiter 2002 October 22 (naming the moon)