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Thelxinoe /θɛlkˈsɪnoʊ.iː/, also known as Jupiter XLII, 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 2004 from pictures taken in 2003, and originally received the temporary designation S/2003 J 22.

Thelxinoe is about 2 kilometres in diameter, and orbits Jupiter at an average distance of 20,454 Mm in 597.607 days, at an inclination of 151° to the ecliptic (153° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.2685.

It was named in March 2005 after Thelxinoe, one of the four original Muses according to some Greek writers, and a daughter of Zeus (Jupiter) by Mnemosyne.

Thelxinoe belongs to the Ananke group, retrograde irregular moons that orbit Jupiter between 19.3 and 22.7 Gm, at inclinations of roughly 150°.

References

1. Noah Webster (1884) A Practical Dictionary of the English Language
2. S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line
3. Daniel W. E. Green (January 25, 2004). "IAUC 8276: S/2003 J 22". International Astronomical Union.
4. Brian G. Marsden (January 24, 2004). "MPEC 2004-B41: S/2003 J 22". International Astronomical Union Minor Planet Center.
5. Daniel W. E. Green (March 30, 2005). "IAUC 8502: Satellites of Jupiter". International Astronomical Union.

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• Ananke group
• Moons of Jupiter
• Irregular satellites
• Discoveries by Scott S. Sheppard
• Astronomical objects discovered in 2004
• Moons with a retrograde orbit
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