简单地说, 当地恒星时(LST local sidereal time), 和天体的赤经( right ascension, RA)及时角(HA hour angle)是直接相关的。
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##1.1 赤道仪######## 赤道仪（equatorial mount，赤道仪式架台装置）是通过与天极极轴对齐的赤经（right ascension，RA）轴旋转补偿地球自转以跟踪天体的架台装置。
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apparent right ascension [天] 视赤经
precession in right ascension [天] 赤经岁差 ; 赤纬岁差
increment of sun's right ascension 太阳赤经的增量
right ascension of ascending node 升交点赤经 ; 升节点赤径
geocentric right ascension 地心赤经
right ascension of meridian 子午线赤经
opposition in right ascension [天] 赤经相冲 ; 赤经冲
N the angular distance measured eastwards along the celestial equator from the vernal equinox to the point at which the celestial equator intersects a great circle passing through the celestial pole and the heavenly object in question 赤经 ( symbol: α) [astronomy] → compare declination
The location is also noted in the lower right corner in celestial coordinates (Right Ascension and Declination).
这个位置也以天球坐标形式显示在右下角（赤经和赤纬）。
Phase modulated resolvers can be used to model the relation between the sidereal time right ascension and the hour angle.
工作在调相状态下的旋转变压器可以用其相位模拟恒星时与赤经、时角的关系。
Using the Snell's law in polar coordinates, the ionospheric refraction effects on the declination and right ascension determination is discussed in this paper.
本文利用极坐标下斯涅尔定律，系统地讨论了电离层折射对赤经赤纬的修正问题，并据此给出了射线描迹法。
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