It is also used for the difference between the observed position of an object (minor planet or comet) and the position calculated from an orbit.

该术语也用于描述观测的某天体(小行星或彗星)的位置与轨道计算值之间的差别。

youdao

In Astrometry, the term is applied to the difference between the observed position (or magnitude) of a reference star and the position (or magnitude) listed in the star catalog.

在天文上，本术语指的是观测的参考星的位置(或星等)与星表上的该星的位置(或星等)的差值。

youdao

In Astrometry, the term is applied to the difference between the observed position (or magnitude) of a reference star and the position (or magnitude) listed in the star catalog.

在天文上，本术语指的是观测的参考星的位置(或星等)与星表上的该星的位置(或星等)的差值。

youdao