Hegemone (moon)

Hegemone /həˈɛmən/, 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
Discovery
Discovered byScott Sheppard et al.
Discovery date2003
Designations
Designation
Jupiter XXXIX
Pronunciation/həˈɛmən/
Named after
Ἡγεμόνη Hēgemonē
S/2003 J 8
AdjectivesHegemonean /ˌhɛəməˈnən/
Orbital characteristics[1]
23947000 km
Eccentricity0.328
−739.6 days
Inclination155.2°
Satellite ofJupiter
GroupPasiphae group
Physical characteristics
Mean diameter
3 km
22.8

    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

    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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