Binary system (disambiguation)

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Binary system may refer to:

Binary number system that represents numeric values using two symbols; 0 and 1

In mathematics and digital electronics, a binary number is a number expressed in the base-2 numeral system or binary numeral system, which uses only two symbols: typically "0" (zero) and "1" (one).

A nebular opposition is a pair of related terms or concepts that are opposite in meaning. Binary opposition is the system by which language and thought, two theoretical opposites are strictly defined and set off against one another. It is the contrast between two mutually exclusive terms, such as on and off, up and down, left and right. Binary opposition is an important concept of structuralism, which sees such distinctions as fundamental to all language and thought. In structuralism, a binary opposition is seen as a fundamental organizer of human philosophy, culture, and language.

A binary system is a system of two astronomical bodies which are close enough that their gravitational attraction causes them to orbit each other around a barycenter (also see animated examples). More restrictive definitions require that this common center of mass is not located within the interior of either object, in order to exclude the typical planet–satellite systems and planetary systems.

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624 Hektor Jupiter trojan

624 Hektor is the largest Jupiter trojan and the namesake of the Hektor family, with a highly elongated shape equivalent in volume to a sphere of approximately 225 to 250 kilometers diameter. It was discovered on 10 February 1907, by astronomer August Kopff at Heidelberg Observatory in southwest Germany, and named after the Trojan prince Hector, from Greek mythology. It has one small 12-kilometer sized satellite, Skamandrios, discovered in 2006.

Steven J. Ostro American scientist

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90 Antiope main-belt asteroid

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4486 Mithra, provisional designation 1987 SB, is an eccentric asteroid and suspected contact-binary, classified as near-Earth object and potentially hazardous asteroid, approximately 2 kilometers in diameter. It belongs to the Apollo group of asteroids and is a relatively slow rotator.

44 Nysa main-belt asteroid

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617 Patroclus, provisional designation 1906 VY is a binary Jupiter trojan approximately 140 kilometers in diameter. It was discovered on 17 October 1906, by astronomer August Kopff at the Heidelberg Observatory in Germany. The asteroid was named after Patroclus from Greek mythology. It was the second trojan to be discovered and the only member of the Trojan camp named after a Greek character. The dark D-type asteroid is also slow rotator and one of the largest Jupiter trojans. Patroclus is one of five Jovian asteroids targeted by the Lucy space probe to be visited in 2033. In 2001, a moon – later named Menoetius, and slightly smaller than its primary – was discovered. It was the first discovery of a binary asteroid among the Jupiter trojans.

Contact binary (small Solar System body) small Solar System body that is composed of two bodies that have gravitated toward each other until they touch

A contact binary is a small Solar System body such as a minor planet or a comet, that is composed of two bodies that have gravitated toward each other until they touch, resulting in a bilobated, peanut-like overall shape. Contact binaries are often rubble piles but distinct from real binary systems such as binary asteroids. The term is also used for stellar contact binaries.

(185851) 2000 DP107 is a sub-kilometer sized asteroid, classified as potentially hazardous asteroid and near-Earth object of the Apollo group that is notable because it provided evidence for binary asteroids in the near-Earth population.

4450 Pan, provisional designation 1987 SY, is a highly eccentric asteroid and contact binary, classified as a potentially hazardous asteroid and near-Earth object of the Apollo group, approximately 1.1 kilometers in diameter.

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(388188) 2006 DP14, provisional designation 2006 DP14, is a sub-kilometer sized, peanut-shaped asteroid on a highly eccentric orbit, classified as near-Earth object and potentially hazardous asteroid of the Apollo group. This contact binary was discovered on 23 February 2006, by astronomers of the LINEAR program at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States. On 10 February 2014, it passed 6.25 lunar distances from Earth. The asteroid is approximately 400 meters in diameter and has a rotation period of 5.77 hours.

<span class="nowrap">(85989) 1999 JD<sub>6</sub></span>

(85989) 1999 JD6 is an Aten asteroid, near-Earth object, and potentially hazardous object in the inner Solar System that makes frequent close approaches to Earth and Venus. On the Earth approach in 2015, it was observed by the Goldstone Solar System Radar and found to be a contact binary with the largest axis approximately 2 kilometers wide, and each lobe about 200–300 meters large. Although 1999 JD6 in its current orbit never passes closer than 0.047 AU to Earth, it is listed as a potentially hazardous object because it is large and might pose a threat in the future.

VFTS 352 contact binary star system

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<span class="nowrap">2014 JO<sub>25</sub></span> Asteroid

2014 JO25 is an asteroid. It was discovered in May 2014 by astronomers at the Catalina Sky Srvey near Tucson, Arizona - a project of NASA's NEO (Near Earth Object) Observations Program in collaboration with the University of Arizona.

<span class="nowrap">(300163) 2006 VW<sub>139</sub></span> Periodic comet

(300163) 2006 VW139, provisional designations 2006 VW139 and P/2006 VW139, as well as periodic cometary number 288P, is a kilometer-sized asteroid from the outer regions of the asteroid belt and the first "binary main-belt comet" ever discovered.