celestial equator system of coordinates

celestial equator system of coordinates

[sə′les·chəl i′kwād·ər ¦sis·təm əv kō′ȯrd·nəts] (astronomy) equatorial system

equatorial system

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.