hour angle

n. 时角

例句与用法：

The London bus departs every hour on the hour.

伦敦的公共汽车每小时零分开出一趟。

It took him half an hour to finish the work.

他花了半个小时做完这项工作。

hour angle

hour angle1.■【天文学】时角[参较sidereal hour angle]

hour angle

名词 hour angle:

the angular distance along the celestial equator from the observer's meridian to the hour circle of a given celestial body

(astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time of day

同义词：HA

hour angle