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233 Asterope : ウィキペディア英語版 | 233 Asterope
233 Asterope is a main-belt asteroid that was discovered by A. Borrelly on May 11, 1883, in Marseilles, France. The asteroid was named after Asterope (or Sterope), one of the Pleiades. It is a rare T-type asteroid〔 and has a relatively dark surface. The spectrum of 233 Asterope bears a resemblance to Troilite, a sulfurous iron mineral found in most iron meteorites.〔 Photometric observations during 1995 show a rotation period of 19.743 hours.〔 Measurements made with the IRAS observatory give a diameter of 109.56 ± 5.04 km and a geometric albedo of 0.08 ± 0.01. By comparison, the MIPS photometer on the Spitzer Space Telescope gives a diameter of 97.54 ± 10.32 km and a geometric albedo of 0.10 ± 0.01.〔 ==References==
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