小惑星1036＜ガニメト＞

＊　小惑星1036ガニメトが2011/10/29地球に最接近　＊ 1036 Ganymed is the largest Amor asteroid, at about 32 km in diameter.[3] It was discovered by Walter Baade on October 23, 1924, and is named after Ganymede, the Trojan prince turned god whom Zeus designated the cupbearer to the Greek gods (Jupiter's moon Ganymede is also named after that individual). It is also a Mars-crosser asteroid. Owing to its early discovery date, Ganymed has a rich observational history. A 1931 paper published the absolute magnitude, based on observations to date, as 9.24,[6] slightly brighter than the present value of 9.45. Ganymed is an S-type asteroid, meaning that it is relatively reflective and composed of iron- and magnesium-silicates. Spectral measurements put Ganymed in the S (VI) spectral subtype, indicating a surface rich in orthopyroxenes, and possibly metals (although if metals are present they are covered and not readily apparent in the spectra).[3] 天文年鑑2011版169頁によると、 10月28日頃、最近120年間（1900−2024年）のうちではもっとも明るい8.3等までなる。 年月日 2011/10/28（9hJST） 赤経2h06.02m　赤緯+15d17.9m 等級（V）8.3m 太陽離角 178度

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Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/1036_Ganymed
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天文年鑑2011
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