zenith distance


zenith distance
The angular distance through the arc of a vertical circle between the zenith and a point on the celestial sphere, measured from the zenith through 90°, for bodies above the horizon. Also known as co-altitude.

Aviation dictionary. 2014.

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  • Zenith distance — Zenith e nith (?; 277), n. [OE. senyth, OF. cenith, F. z[ e]nith, Sp. zenit, cenit, abbrev. fr. Ar. samt urras way of the head, vertical place; samt way, path + al the + ras head. Cf. {Azimuth}.] [1913 Webster] 1. That point in the visible… …   The Collaborative International Dictionary of English

  • Zenith distance — Distance Dis tance, n. [F. distance, L. distantia.] 1. The space between two objects; the length of a line, especially the shortest line joining two points or things that are separate; measure of separation in place. [1913 Webster] Every particle …   The Collaborative International Dictionary of English

  • zenith distance — noun or zenith angle : the angular distance of a celestial object from the zenith measured by the arc of a vertical circle intercepted between the object and the zenith : the complement of the altitude * * * Astron. the angular distance from the… …   Useful english dictionary

  • zenith distance — Astron. the angular distance from the zenith of a point on the celestial sphere to the sphere, measured along a great circle that is perpendicular to the horizon; the complement of the altitude. [1695 1705] * * * …   Universalium

  • Zenith — e nith (?; 277), n. [OE. senyth, OF. cenith, F. z[ e]nith, Sp. zenit, cenit, abbrev. fr. Ar. samt urras way of the head, vertical place; samt way, path + al the + ras head. Cf. {Azimuth}.] [1913 Webster] 1. That point in the visible celestial… …   The Collaborative International Dictionary of English

  • Zenith sector — Zenith e nith (?; 277), n. [OE. senyth, OF. cenith, F. z[ e]nith, Sp. zenit, cenit, abbrev. fr. Ar. samt urras way of the head, vertical place; samt way, path + al the + ras head. Cf. {Azimuth}.] [1913 Webster] 1. That point in the visible… …   The Collaborative International Dictionary of English

  • Zenith telescope — Zenith e nith (?; 277), n. [OE. senyth, OF. cenith, F. z[ e]nith, Sp. zenit, cenit, abbrev. fr. Ar. samt urras way of the head, vertical place; samt way, path + al the + ras head. Cf. {Azimuth}.] [1913 Webster] 1. That point in the visible… …   The Collaborative International Dictionary of English

  • Distance — Dis tance, n. [F. distance, L. distantia.] 1. The space between two objects; the length of a line, especially the shortest line joining two points or things that are separate; measure of separation in place. [1913 Webster] Every particle attracts …   The Collaborative International Dictionary of English

  • Zenith — In broad terms, the zenith is the direction pointing directly above a particular location (perpendicular, orthogonal). Since the concept of being above is itself somewhat vague, scientists define the zenith in more rigorous terms. Specifically,… …   Wikipedia

  • Zenith telescope — A zenith telescope is an instrument adapted for the measurement of small differences of zenith distance, and used in the determination of astronomic latitude.Zenith telescopes are often portable; however the Monument to the Great Fire of London… …   Wikipedia


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