celestial coordinates

celestial coordinates
Two coordinates on the surface of the celestial sphere used to determine the position of a celestial body. Two sets of celestial coordinates are in common use: the equinoctial system, in which the coordinates are a declination and an hour circle, and the horizon system, in which the coordinates are a vertical circle passing through the given celestial body and an altitude circle.
Horizon coordinates.
Equinoctial system of celestial coordinates.

Aviation dictionary. 2014.

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  • Equinox (celestial coordinates) — In astronomy, equinox is a moment in time at which the vernal point, celestial equator, and other such elements are taken to be used in the definition of a celestial coordinate system. The position at other equinoxes can be computed by taking… …   Wikipedia

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  • celestial coordinate — noun : a member of any system of coordinates used for locating a point on the celestial sphere compare ecliptic coordinate, equator system of coordinate, galactic coordinate, horizon coordinate …   Useful english dictionary

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