| 翻訳と辞書 |
| 1909 Alekhin ： ウィキペディア英語版 |
1909 Alekhin
1909 Alekhin, provisional designation , is a stony asteroid and slow rotator from the inner regions of the asteroid belt, about 17 kilometers in diameter. It was discovered by Russian–Ukrainian female astronomer Lyudmila Zhuravlyova at the Crimean Astrophysical Observatory in Nauchnyj, on 4 September 1972.〔
The S-type asteroid orbits the Sun at a distance of 1.9–3.0 AU once every 3 years and 9 months (1,377 days). It has a notably slow rotation period of about 148 hours.〔〔 Its orbit – tilted by 2 degrees to the plane of the ecliptic – shows a significant eccentricity of 0.23. Based on the surveys carried out by Akari, WISE/NEOWISE, its albedo is between 0.05 and 0.07.〔〔〔
The asteroid is scheduled to occlude a 9.1 magnitude star in the Leo constellation on 30 November 2008, dimming the magnitude of both heavenly bodies for a maximum duration of 0.6 seconds. Astronomers had, as of March 2008, not predicted an optimal trajectory for the event.〔 Lyudmila Zhuravlyova is ranked number 43 in Harvard's ranking of those who discovered minor planets. She discovered 200 minor planets, thirteen of which were co-discoveries, between 1972 and 1992.〔
The minor planet was named in honour of Russian-born Alexander Alekhine (1892–1946), chess grandmaster, considered one of the greatest chess players ever.〔
== 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「1909 Alekhin」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.
|
|