Thyone

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The moon of Jupiter – Thyone (XXIX) – was previously temporarily designated as S/2001 J2. It was discovered in mid-December 2001 by the following team of astronomers: S.S. Sheppard, D.C. Jewitt i J. Kleyna. This discovery was achieved by the 3.6-m Canada-France-Hawaii telescope atop Mauna Kea (Hawaii). You can read additional details in Minor Planet Electronic Circular (MPEC).
    Thyone is one of eleven new satellites discovered since the →Voyager-2 Jupiter system fly-by which occured 22 years ago (1979). With this moon, the team discovered also: Autonoe, Hermippe, Eurydome, Sponde, Pasithee, Euanthe, Kale, Orthosie, Euporie and Aitne.
    The name of that moon is of mythological origin. Thyone was the daughter of Cadmus and Harmonia. As a Theban princess she was called Semele. Bent on revenge for an affair, Hera persuaded Semele to demand that Zeus come to her in all his divine splendor. Zeus fulfilled her wish but since Semele was a mortal woman she was destroyed by the lightning bolt. Zeus rescued the unborn child from the mother's ashes and sewed the six-months old fetus in his thigh until it was ready to be born. It was Dionysus (god of wine, agriculture, and fertility of nature). As an adult, he retrieved his mother from Hades and brought her to the Olympus. As a goddess she was called Thyone...
    The moon by this name is in elliptical retrograde orbit (→eccentricity e = 0.2286) with a →semimajor axis a = 20,939,000 km. At pericenter (closest to the planet) Thyone is separated from the Jupiter a distance of q = 16,152,345 km. At apocenter (furthest from the planet) this moon is separated from the Jupiter a distance of Q = 25,725,655 km. In future these parameters may vary due to a large orbital distance from Jupiter and the orbital motion being disturbed by the Sun and other factors. Perhaps it is a captured asteroid (with a microscopic mass: ~8.9920×10¹³ kg – it equals almost 82 times less than a mountain like Giewont!), and in future will possibly return to heliocentric orbit.