Secular perturbation
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A perturbation is a type of perturbation observed in the solar system in which an orbital element increases or decreases unilaterally over time. However, it generally appears in orbital elements expressed in degrees, such as the ecliptic longitude of ascending or descending point and the argument of perihelion. Source : Heibonsha Encyclopedia About MyPedia Information |
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長年摂動とも。太陽系の天体に見られる摂動のうち，軌道要素が時間とともに一方的に増大あるいは減少していくもの。ただし一般には，軌道要素のうち昇降点黄経，近日点引数など，角度で表されるものに現れる。
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