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120 Lachesis : ウィキペディア英語版 | 120 Lachesis
120 Lachesis is a large main-belt asteroid. It was discovered by French astronomer Alphonse Borrelly on April 10, 1872, and independently by German-American astronomer Christian Heinrich Friedrich Peters on April 11, 1872, then named after Lachesis, one of the Moirai, or Fates, in Greek mythology.〔 A Lachesean occultation of a star occurred in 1999 and was confirmed visually by five observers and once photoelectrically.〔 Photometric observations of this asteroid were made in early 2009 at the Organ Mesa Observatory in Las Cruces, New Mexico. The resulting light curve shows a synodic rotation period of 46.551 ± 0.002 hours with a brightness variation of 0.14 ± 0.02 in magnitude.〔 It has the longest rotation period of an asteroid more than 150km in diameter.〔 As a primitive C-type asteroid〔 it is probably composed of carbonaceous material. ==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「120 Lachesis」の詳細全文を読む
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