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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 1750 Eckert ： ウィキペディア英語版 1750 Eckert 1750 Eckert, provisional designation , is a stony asteroid, slow rotator, and Mars-crosser from the inner regions of the asteroid belt. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory on 15 July 1950.〔 The asteroid is a member of the Hungaria family, a group that forms the innermost dense concentration of asteroids in the Solar System. It measures about 7 kilometers in diameter and orbits the Sun at a distance of 1.6–2.3 AU once every 2 years and 8 months (977 days). Its orbit shows an eccentricity of 0.17 and is tilted by 19 degrees to the plane of the ecliptic. Every 375 hours, it slowly rotates once around its axis.〔 This is the sixth-longest rotation period of all known Mars-crossing asteroids.〔 The S-type asteroid has an albedo of 0.20, based on observations by the Japanese Akari satellite.〔 The minor planet was named in memory of American astronomer Wallace Eckert (1902–1971), director at the United States Naval Observatory from 1940 to 1945, president of IAU's Commission 7, and pioneer in the use of automatic computing machines. In the late 1940s and early 1950s, he used the then most powerful computing machines ever built, SSEC and NORC, for astronomical calculations. The asteroid 1625 The NORC was named after one of these early super-computers. Eckert also produced the integration of the orbits of the five outer planets in collaboration with Brouwer and Clemence, after whom the minor planets 1746 Brouwer and 1919 Clemence were named. By use of sophisticated computing techniques, Eckert was able to check and extend Brown's lunar theory ''(also see 1643 Brown)''.〔 == 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「1750 Eckert」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.