equinoctial system of coordinates

equinoctial system of coordinates

[‚ē·kwə′näk·shəl ¦sis·təm əv kō′ȯrd·ən·əts]
(astronomy)

equatorial system

equatorial systemclick for a larger image
A set of celestial coordinates based on the celestial equator as the primary great circle. It is usually expressed as declination and an hour angle or a sidereal hour angle. Also called an equinoctial system of coordinates or a celestial equator system of coordinates. See also celestial equator.