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121 Hermione : ウィキペディア英語版 | 121 Hermione
121 Hermione is a very large asteroid discovered in 1872. It orbits in the Cybele group〔 in the far outer asteroid belt. As an asteroid of the dark C spectral type, it is probably composed of carbonaceous materials. In 2002, a small moon was found to be orbiting Hermione.〔(Linda T. Elkins-Tanton - Asteroids, Meteorites, and Comets (2010) - Page 96 (Google Books) )〕 == Discovery == Hermione was discovered by J. C. Watson on May 12, 1872, from Ann Arbor,〔 and named after Hermione, daughter of Menelaus and Helen in Greek mythology.
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