# hour angle

__noun__**1.**the angular distance along the celestial equator from the observer's meridian to the hour circle of a given celestial body (__Freq.__1)•__Hypernyms__: ↑distance**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•__Syn__: ↑HA•__Hypernyms__: ↑angular distance* * *

*noun***:**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* * *

*Astron.*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.

*Useful english dictionary.
2012.*

### Look at other dictionaries:

**Hour angle**— Hour Hour, n. [OE. hour, our, hore, ure, OF. hore, ore, ure, F. heure, L. hora, fr. Gr. ?, orig., a definite space of time, fixed by natural laws; hence, a season, the time of the day, an hour. See {Year}, and cf. {Horologe}, {Horoscope}.] 1. The … The Collaborative International Dictionary of English**hour angle**— n. Astron. the angle formed at the pole, or its arc on the celestial equator, between the hour circle of a celestial object and the observer s celestial meridian measured in hours, minutes, etc.: it represents the elapsed time since the object… … English World dictionary**hour-angle**— hourˈ angle noun (astronomy) The angle (usu measured as time) between the declination circle of a body observed and the observer s meridian • • • Main Entry: ↑hour … Useful english dictionary**Hour angle**— In astronomy, the hour angle is one of the coordinates used in the equatorial coordinate system for describing the position of a point on the celestial sphere.The hour angle of a point is the angle between the half plane determined by the Earth… … Wikipedia**hour angle**— The angular distance west of a celestial meridian or hour circle; the arc of the celestial equator, or the angle at the celestial pole, between the upper branch of a celestial meridian or hour circle and the hour circle of a celestial body or the … Aviation dictionary**hour angle**— Astron. 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] * * * ▪ astronomy in astronomy, the angle between an observer s meridian … Universalium**hour angle**— valandų kampas statusas T sritis fizika atitikmenys: angl. hour angle vok. Stundenwinkel, m rus. часовой угол, m pranc. angle horaire, m … Fizikos terminų žodynas**hour angle**— hour′ an gle n. astron. the angle, measured westward through 360°, between the celestial meridian of an observer and the hour circle of a celestial body • Etymology: 1830–40 … From formal English to slang**hour angle**— noun Date: circa 1837 the angle between the celestial meridian of an observer and the hour circle of a celestial object measured westward from the meridian … New Collegiate Dictionary**Greenwich hour angle**— hour angle measured from the meridian of Greenwich, England. * * * … Universalium