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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 Circular orbit ： ウィキペディア英語版 Circular orbit :''For other meanings of the term "orbit", see orbit (disambiguation)'' A circular orbit is the orbit at a fixed distance around any point by an object rotating around a fixed axis. Below we consider a circular orbit in astrodynamics or celestial mechanics under standard assumptions. Here the centripetal force is the gravitational force, and the axis mentioned above is the line through the center of the central mass perpendicular to the plane of motion. In this case not only the distance, but also the speed, angular speed, potential and kinetic energy are constant. There is no periapsis or apoapsis. This orbit has no radial version. ==Circular acceleration== Transverse acceleration (perpendicular to velocity) causes change in direction. If it is constant in magnitude and changing in direction with the velocity, we get a circular motion. For this centripetal acceleration we have :$a\backslash ,\; =\; \backslash frac\; \backslash ,\; =$ where: *$v\backslash ,$ is orbital velocity of orbiting body, *$r\backslash ,$ is radius of the circle *$\backslash omega\; \backslash$ is angular speed, measured in radians per unit time. The formula is dimensionless, describing a ratio true for all units of measure applied uniformly across the formula. If the numerical value of $\backslash mathbf$ is measured in meters per second per second, then the numerical values for $v\backslash ,$ will be in meters per second, $r\backslash ,$ in meters, and $\backslash omega\; \backslash$ in radians per second. 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「Circular orbit」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.