Akademik

1. the angular distance along the celestial equator from the observer's meridian to the hour circle of a given celestial body (Freq. 1)

2. (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

: the angle between the celestial meridian of an observer and the hour circle of a celestial object measured westward from the meridian — compare meridian angle

the angle, measured westward through 360°, between the celestial meridian of an observer and the hour circle of a celestial body. Cf. sidereal hour angle.

[1830-40]

hour angle,

Astronomy. the angular distance or arc of the celestial equator between the meridian and the hour circle of a heavenly body, measured westward, used in determining solar time or, sometimes, in designating the position of a celestial body.