V2EX ascending node

Ascending Node

释义 Definition

(天文学/轨道力学)升交点:天体的轨道与参考平面(如黄道面、地球赤道面)相交时,天体由参考平面南侧穿越到北侧的那个交点。常用于描述轨道倾角、轨道取向等参数(如“升交点赤经/升交点经度”)。

发音 Pronunciation

/snd nod/

例句 Examples

The satellite crossed the ascending node at dawn.
卫星在黎明时分通过了升交点。

In orbital mechanics, the ascending node helps define the orientation of an orbit relative to the reference plane.
在轨道力学中,升交点用于界定轨道相对于参考平面的朝向。

词源 Etymology

ascending 来自拉丁语 ascendere(“向上攀升、上升”),node 源自拉丁语 nodus(“结、节点”)。合起来指“上升穿越参考平面时的节点/交点”,因此译作“升交点”。

相关词 Related Words

文学与著作中的用例 Literary Works

  • Orbital Mechanics for Engineering Students(Howard D. Curtis):在介绍轨道六根数时频繁使用 ascending node
  • Fundamentals of Astrodynamics(Bate, Mueller, White):用于说明轨道平面与参考平面的几何关系与“升交点赤经”。
  • Explanatory Supplement to the Astronomical Almanac:在天体历表与坐标系统章节中讨论交点(nodes)与 ascending node 的定义与测量。
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