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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク 1845 Helewalda ： ウィキペディア英語版 1845 Helewalda 1845 Helewalda, provisional designation 1972 UC, is a carbonaceous asteroid in the outer regions of the asteroid belt. It orbits the Sun at a distance of 2.8–3.1 AU once every 5.12 years (1,870 days).〔 The asteroid was discovered by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern on 30 October 1972.〔 ''Helewalda'' has a well-determined rotation period of 7.4 hours with several photometric measurements taken or evaluated between 2009 and 2015.〔〔〔〔 The Light Curve Data Base project calculated the body's diameter to be about 32 kilometers, based on an assumed albedo of 0.057 for a C-type asteroid, while measurements from the NEOWISE mission detected it to be much more reflective and therefore only 20 kilometers in diameter.〔〔 The discoverer named a pair of asteroids after two of his former schoolmates, Susi and Helen, both from the small village of Wald, Zürich in Switzerland. This one was dedicated to Helen, while the previously numbered asteroid 1844 Susilva was given to Susi.〔 == 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「1845 Helewalda」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.