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单词 Longitude of periastron
释义

Longitude of periastron

中文百科

近心点经度 Longitude of the periapsis

(重定向自Longitude of periastron)

近心点经度(符号为ω)是在太空动力学中,当轨道倾角不为0时,描述在轨道上的天体近心点(在轨道上最接近中心天体的点)由春分点为起点量度的经度。进心点经度是一个复合的角度,一部分在参考平密上量度,其余的则在轨道平面上量度。同样的,任何近心点经度的变量(例如平经度和真经度)也都是复合的角度。

英语百科

Longitude of the periapsis 近心点经度

(重定向自Longitude of periastron)

In celestial mechanics, the longitude of the periapsis (symbolized ϖ) of an orbiting body is the longitude (measured from the point of the vernal equinox) at which the periapsis (closest approach to the central body) would occur if the body's inclination were zero. For motion of a planet around the Sun, this position could be called longitude of perihelion. The longitude of periapsis is a compound angle, with part of it being measured in the plane of reference and the rest being measured in the plane of the orbit. Likewise, any angle derived from the longitude of periapsis (e.g. mean longitude and true longitude) will also be compound.

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更新时间:2025/6/20 4:03:01