|
In astrodynamics, an orbiting body () is a body that orbits a primary body (). The orbiting body is properly referred to as the secondary body.〔NASA "Dictionary of Technical Terms for Aerospace Use" http://er.jsc.nasa.gov/SEH/s.html, retrieved 5/11/2010〕 It is less massive than the primary body (i.e. ). Under standard assumptions in astrodynamics the barycenter of the two bodies is a focus of both orbits. Pertaining to astronomy, an orbiting body (sometimes seen as OB) is any object smaller than the body it orbits. These may include, but are not limited to, comets, planets, dwarf planets, moons, and asteroids. ==See also== *Primary body 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「orbiting body」の詳細全文を読む スポンサード リンク
|