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

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
Alternative names	S/2000 J 2
Adjectives	Kalykean /kælɪˈkiːən/
Orbital characteristics [3]
Semi-major axis	23583000 km
Eccentricity	0.245
Orbital period	−743.0 days
Mean anomaly	116.3°
Inclination	165.2°
Longitude of ascending node	38.7°
Argument of perihelion	216.6°
Satellite of	Jupiter
Group	Carme group
Physical characteristics
Mean diameter	6.9±1.3 km[4]
Albedo	0.029±0.014[4]
Apparent magnitude	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]

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°.

References

1. 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. S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line
4. 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.
5. IAUC 7555: Satellites of Jupiter Archived 2002-09-16 at the Wayback Machine 2001 January 5 (discovery)
6. IAUC 7998: Satellites of Jupiter 2002 October 22 (naming the moon)