equatorial


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equatorial

1. of, like, or existing at or near the equator
2. Astronomy of or referring to the celestial equator

Equatorial

 

a lens or mirror telescope on a parallactic, or equatorial, mounting (seeTELESCOPE MOUNTING). A clock mechanism rotates the telescope around a polar axis at a rate of one rotation per 24 sidereal hours, so that the celestial object being observed, which moves because of the apparent diurnal rotation of the celestial sphere, remains in the field of view of the telescope. Graduated circles with measuring devices are secured to the axes to direct the telescope at the celestial object according to its hour angle and declination and to enable the approximate determination of its coordinates. Auxiliary astronomical tubes mounted on the primary one, called the finder and the guide, are used to locate the necesssary object and to keep the instrument directed at it during photography.

Equatorials may be visual (equipped with an ocular that has a micrometer for differential measurements) or photographic (with plateholders). (SeeASTRONOMICAL INSTRUMENTS AND DEVICES.)

References in periodicals archive ?
The Democratic Party of Equatorial Guinea, after knowing the information disseminated by the Public Prosecutor, expresses its total repudiation before these Machiavellian plans of destabilization and aggression against our Nation and against our President, as well as his absolute condemnation towards the organizers and participants in these facts.
These five agreements were signed by Minister of Foreign Affairs Khemaies Jhinaoui and Equatorial Guinea's Minister for Foreign Affairs and Cooperation SimeEon Oyono Esono Angue.
It would be recalled that Equatorial Guinea's president had paid a similar visit to the Buhari at Aso Rock on Feb 12, 2016.
Equatorial Guinea was a former Spanish colony, and is the only African country in which Spanish is an official language and which has a tradition of literature in Spanish.
M2 EQUITYBITES-June 5, 2017-ExxonMobil Acquires Exploration Acreage Offshore Equatorial Guinea
Buyer: Exxon Mobil/ Exploration and Production Equatorial Guinea (Deepwater) Ltd
The United States established diplomatic relations with Equatorial Guinea in 1968, following the country's independence from Spain.
Today is the Independence Day of Equatorial Guinea which commemorates its freedom from Spain in 1968.
MALABO (CyHAN)- Equatorial Guinea's football federation was fined 100,000 dollars on Friday for their team's semifinal violence at the African Cup of Nations.
EQUATORIAL Guinea will host the 2015 African Nations Cup after Morocco was stripped of the event having asked for it to be postponed over fears of the spread of the Ebola virus, the Confederation of African Football (CAF) said on Friday.
CAIRO, Nov 14 (KUNA) -- The Confederation of African Football (CAF) announced Friday that Equatorial Guinea will be the host of the upcoming Africa Cup of Nations 2015.
New York (AirGuideBusiness - Business & Industry Features) Tue, Oct 7, 2014 - CEIBA Intercontinental, based in Equatorial Guinea, has recovered its sole Boeing 777-200LR, CS-TQX (msn 40668), after it was impounded at Madrid Barajas by the International Chamber of Commerce (ICC).