[ee-kwuh-tawr-ee-uh l, -tohr-, ek-wuh-] /ˌi kwəˈtɔr i əl, -ˈtoʊr-, ˌɛk wə-/
of, relating to, or near an , especially the of the earth.
of, like, or typical of the regions at the earth’s :
a telescope mounting having two axes of motion, one parallel to the earth’s axis and one at right angles to it.
a telescope with such a mounting.
of, like, or existing at or near the equator
(astronautics) (of a telescope) mounted on the perpendicular axes, one of which is parallel to the earth’s axis: an equatorial orbit
(astronomy) of or referring to the celestial equator: equatorial coordinates
an equatorial mounting for a telescope
1660s, from equator + -al (1).
- Equatorial coordinate system
equatorial coordinate system (ē’kwə-tôr’ē-əl, ěk’wə-) The coordinate system in which a celestial object’s position on the celestial sphere is described in terms of its declination and right ascension, measured with respect to the celestial equator. Declination and right ascension correspond directly to geographic latitude and longitude as projected outward onto the celestial sphere. Declination is […]
noun 1. an ocean current that flows E between the west-flowing equatorial currents.
noun 1. a republic in W equatorial Africa, comprising the mainland province of Río Muni and the island province of Bioko: formerly a Spanish colony. 10,824 sq. mi. (28,034 sq. km). Capital: Malabo. noun 1. a republic of W Africa, consisting of Río Muni on the mainland and the island of Bioko in the Gulf […]
- Equatorial mount
equatorial mount A mounting for astronomical telescopes having two axes, one of which revolves about an axis that is parallel to the axis of the Earth’s rotation. This axis can be driven by a motor at a rate equal to the diurnal motion of the celestial object being viewed, allowing the telescope to keep the […]