赤せっ経けい

noun

right ascension

Astronomical coordinate; one of the two equatorial coordinates, measured eastward along the celestial equator from the vernal equinox.

• 天てん体たいの位い置ちは赤せっ経けいと赤せき緯いで表あらわされる。

  The position of a celestial body is expressed by right ascension and declination.