Kalyke
Kalyke /ˈkælɪkiː/, 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 et al. in 2000, and given the temporary designation S/2000 J 2.[5][1]
![]() Kalyke imaged by the Canada-France-Hawaii Telescope in December 2001 | |
Discovery[1] | |
---|---|
Discovered by | Scott S. Sheppard et al. |
Discovery site | Mauna Kea Obs. |
Discovery date | 23 November 2000 |
Designations | |
Designation | Jupiter XXIII |
Pronunciation | /ˈkælɪkiː/[2] |
Named after | Καλύκη Kalykē |
S/2000 J 2 | |
Adjectives | Kalykean /kælɪˈkiːən/ |
Orbital characteristics [3] | |
23583000 km | |
Eccentricity | 0.245 |
−743.0 days | |
116.3° | |
Inclination | 165.2° |
38.7° | |
216.6° | |
Satellite of | Jupiter |
Group | Carme group |
Physical characteristics | |
Mean diameter | 6.9±1.3 km[4] |
Albedo | 0.029±0.014[4] |
21.8 | |
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 721.021 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.[6]

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°.
References
- 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)
- as 'Calyce' in Noah Webster (1884) A Practical Dictionary of the English Language
- S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line
- 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. Bibcode:2015ApJ...809....3G. doi:10.1088/0004-637X/809/1/3. 3.
- IAUC 7555: Satellites of Jupiter Archived 2002-09-16 at the Wayback Machine 2001 January 5 (discovery)
- IAUC 7998: Satellites of Jupiter 2002 October 22 (naming the moon)