Chaldene

Chaldene /kælˈdiːniː/, also known as Jupiter XXI, 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 10.[3][1][4]

Chaldene

Chaldene 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	26 November 2000
Designations
Designation	Jupiter XXI
Pronunciation	/kælˈdiːniː/
Named after	Χαλδηνή Chaldēnē
Alternative names	S/2000 J 10
Adjectives	Chaldenean /kældɪˈniːən/
Orbital characteristics [2]
Semi-major axis	23179000 km
Eccentricity	0.251
Orbital period	−723.8 days
Mean anomaly	131.6°
Inclination	165.2°
Longitude of ascending node	148.7°
Argument of perihelion	282.5°
Satellite of	Jupiter
Group	Carme group
Physical characteristics
Mean diameter	4 km
Apparent magnitude	22.5

Chaldene is about 3.8 kilometres in diameter, and orbits Jupiter at an average distance of 22,713,000 km in 699.327 days, at an inclination of 167° to the ecliptic (169° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.2916.

It was named in October 2002 after Chaldene, the mother of Solymos by Zeus in Greek mythology.[5]

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-A29: S/2000 J 7, S/2000 J 8, S/2000 J 9, S/2000 J 10, S/2000 J 11 2001 January 15 (discovery and ephemeris)
2. S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line
3. IAUC 7555: Satellites of Jupiter Archived 2002-09-16 at the Wayback Machine 2001 January 5 (discovery)
4. MPEC 2001-T59: S/2000 J 8, S/2000 J 9, S/2000 J 10 2001 October 15 (revised ephemeris)
5. IAUC 7998: Satellites of Jupiter 2002 October 22 (naming the moon)