Equant

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Equant

an auxiliary point in the Ptolemaic system (the point E in the figure), introduced by Ptolemy to match observed planetary motions with motions previously calculated with deferents and epicycles.

Figure 1

Describing the motion of the planets with circles and constant angular velocities, Ptolemy placed the earth (T) outside the center of the deferent (C). He assumed that the center of the epicycle (O) of a planet moved nonuniformly along the deferent, but in such a manner that the motion seemed uniform to an observer located at the equant, which was symmetric to the position of the earth relative to the center of the deferent.

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References in periodicals archive ?

The presence of cavity spar and equant blocky cement suggest role of meteoric water during burial (Bjorlykke, 2014).

Diagenetic History and Microfacies Analysis of Upper Permian Wargal Limestone in the Central Salt Range, Pakistan

This paper offers a close reading of Ptolemy's philosophical defense of the equant in Almagest 9.2.

PHRONESIS: Vol. 62, No. 4, 2017

Microsparite and sparite calcite crystals are mostly equant to elongated rhombohedrons or scalenohedrons, but also a few prismatic crystals were observed.

Carbonate cementation in the late glacial outwash and beach deposits in northern Estonia/Sekundaarne karbonaatne tsementatsioon hilisglatsiaalsetes glatsifluviaalsetes ja rannikusetetes Pohja-Eestis

and the Management of HPPCL expressed appreciation for the efforts put forth by Orange Business Services (Equant Technology Services (I) Pvt.

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France Telecom subsequently bought out its partners, as well as acquiring Dutch network operator Equant.

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Orange Business Services announced on Monday that it is launching its new international gateway in Mumbai after receiving clearance from the Department of Telecommunications (DoT) for its Indian entity Equant Network Services India Pvt Ltd.

Orange Business Services launches new international gateway in Mumbai

Pyroxene: The pyroxene is mainly represented by both, ortho- and clinohypersthene, occurring as small euhedral to subhedral prismatic crystals and square or equant basal sections.

Petrogenesis of Plio-Pleistocene volcanic rocks from the Chagai arc, Balochistan, Pakistan

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Other companies already on Key Business Park include outsourcing and distribution company Bunzl, architectural ironmongers suppliers Eisenwareswann and data communications specialist Equant. Bigwood director Les Balla said: "This cluster of high net worth companies underlines that Key Business Park is an attractive proposition and there are still many top companies waiting to relocate to Birmingham."

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The Bigwood deal follows on the heels of a commercial lease signed this summer with Air Products, the UK's leading provider of home oxygen, serving over 50,000 patients Other companies already on Key Business Park, which overlooks the A38, include outsourcing and distribution company Bunzl, architectural ironmongers suppliers Eisenware Swann and data communications specialist Equant.

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According to the EC, the new communications infrastructure, known as "secured Trans European Services for Telematics between Administrations (sTESTA)" will be built by Equant and Hewlett-Packard.

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Monocrystalline quartz: equant to slightly elongate, straight extinction.

Goddesses, snake tubes, and plaques: analysis of ceramic ritual objects from the LM IIIC shrine at Kavousi

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