Hegemone (moon)

Hegemone
Discovery
Discovered by	Scott Sheppard et al.
Discovery date	2003
Designations
Designation	Jupiter XXXIX
Pronunciation	/hɪˈdʒɛməniː/
Named after	Ἡγεμόνη Hēgemonē
Alternative names	S/2003 J 8
Adjectives	Hegemonean /ˌhɛdʒɪməˈniːən/
Orbital characteristics [1]
Semi-major axis	23947000 km
Eccentricity	0.328
Orbital period	−739.6 days
Inclination	155.2°
Satellite of	Jupiter
Group	Pasiphae group
Physical characteristics
Mean diameter	3 km
Apparent magnitude	22.8

Hegemone /hɪˈdʒɛməniː/, also known as Jupiter XXXIX, is a natural satellite of Jupiter. It was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2003, and given the temporary designation S/2003 J 8.[2][3]

Hegemone is about 3 kilometres in diameter, and orbits Jupiter at an average distance of 23,703,000 km in 745.500 days, at an inclination of 153° to the ecliptic (151° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.4077.

It was named in March 2005 after Hegemone, one of the Graces, and a daughter of Zeus (Jupiter).[4]

Hegemone belongs to the Pasiphae group, irregular retrograde moons orbiting Jupiter at distances ranging between 22.8 and 24.1 Gm, and with inclinations ranging between 144.5° and 158.3°.

References

S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line
IAUC 8088: S/2003 J 8 2003 March 6 (discovery)
MPEC 2003-E24: S/2003 J 8 2003 March 6 (discovery and ephemeris)
IAUC 8502: Satellites of Jupiter 2005 March 30 (naming the moon)

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[1] S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line

[2] IAUC 8088: S/2003 J 8 2003 March 6 (discovery)

[3] MPEC 2003-E24: S/2003 J 8 2003 March 6 (discovery and ephemeris)

[4] IAUC 8502: Satellites of Jupiter 2005 March 30 (naming the moon)

Moons of Jupiter
Listed in approximately increasing distance from Jupiter. Provisional designations in italics.
Inner moons	Metis Adrastea Amalthea Thebe
Galilean moons	Io Europa Ganymede Callisto
Themisto group	Themisto
Himalia group	Leda Himalia Ersa Pandia Lysithea Elara Dia
Carpo group	Carpo
Valetudo group	Valetudo
Ananke group	S/2003 J 12(?) Euporie Eupheme Jupiter LV Jupiter LII Thelxinoe Euanthe Helike Orthosie Jupiter LXVIII Jupiter LIV Jupiter LXIV Iocaste S/2003 J 16(?) Praxidike Harpalyke Mneme Hermippe Thyone Jupiter LXX Ananke
Carme group	Jupiter LXXII Herse Aitne Kale Taygete Jupiter LXI Chaldene S/2003 J 10(?) Erinome Kallichore Jupiter LXVI Jupiter LXIX Kalyke Carme Jupiter LXIII Pasithee Jupiter LI Eukelade Arche Isonoe S/2003 J 9(?) Eirene
Pasiphae group	Jupiter LXVII Philophrosyne S/2003 J 23(?) Aoede Callirrhoe Eurydome Kore Cyllene Jupiter LVI Jupiter LIX S/2003 J 4(?) Pasiphae Hegemone Sinope Sponde Autonoe Megaclite S/2003 J 2(?)
See also	Rings of Jupiter Jupiter's moons in fiction
Category