拱点

利用Jacobi积分常数绘制了航天器在Ivar周围的零速度曲线，并分析了航天器的可能运动区域，给出了航天器不碰撞小行星Ivar的边界条件及不同偏心率下的近拱点半径。

According to integral Jacobi constant , the spacecraft zero-velocity curves in the vicinity of asteroid is described and feasible motion regime is analyzed . Limited condition and periapsis radius corresponding to difference eccentricity against impact surface of the asteroid Ivar is presented .

幂律引力作用下从拱点抛出质点的运动轨道

Orbit of a particle ejected from APSIS exerted by central force following power law

在柱顶和拱形的起拱点之间可能存在柱上楣构的部分。

There may be a section of entablature between the capital and the springing of the arch .

穿过用角度来测量的进拱点的一个轨道里的某点的角距离。

The angular distance of a point in an orbit past the point of periapsis measured in degrees .