Hegemone (moon)

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

Hegemone /həˈdʒɛməniː/, 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)

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Moons of Jupiter
Listed in increasing approximate distance from Jupiter
Inner moons (4)	Metis Adrastea Amalthea Thebe
Galilean moons (4)	Io Europa Ganymede Callisto
Themisto group (1)	Themisto
Himalia group (9)	Leda Ersa S/2018 J 2 Himalia Pandia Lysithea Elara S/2011 J 3 Dia
Carpo group (2)	S/2018 J 4 Carpo
Valetudo group (1)	Valetudo
Ananke group (26)	Euporie Jupiter LV Eupheme S/2021 J 3 Jupiter LII Jupiter LIV Mneme Euanthe S/2003 J 16 Harpalyke Orthosie S/2022 J 3 Helike S/2021 J 2 Praxidike Jupiter LXIV S/2021 J 1 S/2003 J 12 Jupiter LXVIII Thelxinoe Thyone S/2003 J 2 Ananke Iocaste Hermippe Jupiter LXX
Carme group (30)	S/2022 J 1 S/2022 J 2 S/2016 J 3 Pasithee Jupiter LXIX S/2021 J 6 S/2003 J 24 Chaldene Jupiter LXIII Isonoe S/2021 J 4 Kallichore Erinome Kale Eirene Aitne Eukelade Arche Taygete Jupiter LXXII Carme Herse Jupiter LXI Jupiter LI S/2003 J 9 Jupiter LXVI Kalyke S/2018 J 3 S/2021 J 5 S/2003 J 10
Pasiphae group (18)	Philophrosyne Eurydome Jupiter LVI S/2003 J 4 S/2016 J 4 Jupiter LXVII Hegemone Pasiphae Sponde Megaclite Cyllene Sinope Jupiter LIX Aoede Autonoe Callirrhoe S/2003 J 23 Kore
See also	Rings of Jupiter Jupiter's moons in fiction
Category