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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 Co-orbital configuration ： ウィキペディア英語版 Co-orbital configuration In astronomy, a co-orbital configuration is a configuration of two or more astronomical objects (such as asteroids, moons, or planets) orbiting at the same, or very similar, distance from their primary, i.e. they are in a 1:1 mean-motion resonance. (or 1:−1 if orbiting in opposite directions) There are several classes of co-orbital objects, depending on their point of libration. The most common and best-known class is the trojan, which librate around one of the two stable Lagrangian points (Trojan points), and , 60° ahead of and behind the larger body respectively. Another class is the horseshoe orbit, in which objects librate around 180° from the larger body. Objects librating around 0° are called quasi-satellites.〔(Dynamics of two planets in co-orbital motion )〕 An exchange orbit occurs when two co-orbital objects are of similar masses and thus exert a non-negligible influence on each other. The objects can exchange semi-major axes or eccentricities when they approach each other. ==Parameters== Orbital parameters that are used to describe the relation of co-orbital objects are the longitude of the periapsis difference and the mean longitude difference. The longitude of the periapsis is the sum of the mean longitude and the mean anomaly $(=\; \backslash varpi\; +\; M)$ and the mean longitude is the sum of the longitude of the ascending node and the argument of periapsis $(\backslash varpi\; =\; \backslash Omega\; +\; \backslash omega)$ . 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「Co-orbital configuration」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.