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Encyclopedia > Antares
Antares A/B
Observation data
Epoch J2000
Constellation Scorpius
Right ascension 16h 29m 24.4s
Declination −26° 25' 55"
Apparent magnitude (V) 1.09
Characteristics
Spectral type M1.5Iab-Ib/B4Ve
B-V color index 1.87
U-B color index 1.34
Variable type LC-type
Astrometry
Radial velocity (Rv) −3.4 km/s
Proper motion (μ) RA: −10.16 mas/yr
Dec.: −23.21 mas/yr
Parallax (π) 5.40 ± 1.68 mas
Distance approx. 600 ly
(approx. 190 pc)
Absolute magnitude (MV) −5.28
Details
Mass 15-18 M
Radius 700 R
Luminosity 65,000(bolometric) L
Temperature 3,500 K
Metallicity -
Rotation -
Age - years
Other designations
α Scorpii, 21 Sco, Cor Scorpii, Kalb al Akrab, Scorpion's Heart, Vespertilio, HR 6134, CD -26°11359, HD 148478, SAO 184415, FK5 616, WDS 16294-2626, CCDM 16294-2626, HIP 80763.
Database references
SIMBAD data

Antares (α Scorpii / Alpha Scorpii) is the brightest star in the constellation Scorpius and one of the brightest stars in the nighttime sky. Along with Aldebaran, Spica, and Regulus it is one of the four brightest stars near the ecliptic. The similarly colored Aldebaran lies almost directly opposite Antares in the Zodiac. In astronomy, an epoch is a moment in time for which celestial coordinates or orbital elements are specified. ... Orion is a remarkable constellation, visible from most places on the globe at one time or another during the year. ... Scorpius (Latin for scorpion, symbol , Unicode ♏) is one of the constellations of the zodiac. ... Right ascension (RA; symbol α: Greek letter alpha) is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. ... In astronomy, declination (dec) is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. ... // Headline text HEY!! HOW ARE YOU ALL?? Its nice of you to come read this page. ... In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral characteristics, and subsequently refined in terms of other characteristics. ... In astronomy, color index is a simple numerical expression that determines the color of an object, which in the case of a star gives its temperature. ... In astronomy, color index is a simple numerical expression that determines the color of an object, which in the case of a star gives its temperature. ... Most stars are of almost constant luminosity. ... This article does not cite its references or sources. ... Radial velocity is the velocity of an object in the direction of the line of sight. ... kilometre per second is an SI derived unit of both speed (scalar) and velocity (vector), signified by the symbol km/s or km s-1. ... The proper motion of a star is the motion of the position of the star in the sky (the change in direction in which we see it, as opposed to the radial velocity) after eliminating the improper motions of the stars, which affect their measured coordinates but are not real... A milliarcsecond (m, mas) , or a thoundsanth of an arcsecond. ... A year is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ... A milliarcsecond (m, mas) , or a thoundsanth of an arcsecond. ... A year is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ... Parallax, or more accurately motion parallax (Greek: παραλλαγή (parallagé) = alteration) is the change of angular position of two stationary points relative to each other as seen by an observer, due to the motion of an observer. ... A milliarcsecond (m, mas) , or a thoundsanth of an arcsecond. ... Distance is a numerical description of how far apart things lie. ... A light year, abbreviated ly, is the distance light travels in one year: roughly 9. ... Stellar parallax motion The parsec (symbol pc) is a unit of length used in astronomy. ... In astronomy, absolute magnitude is the apparent magnitude, m, an object would have if it were at a standard luminosity distance away from us (in the absence of interstellar extinction!). It allows the overall brightnesses of objects to be compared without regard to distance. ... Mass is a property of a physical object that quantifies the amount of matter and energy it is equivalent to. ... In astronomy, the solar mass is a unit of mass used to express the mass of stars and larger objects such as galaxies. ... In classical geometry, a radius of a circle or sphere is any line segment from its center to its boundary. ... In astronomy, the solar radius is a unit of length used to express the size of stars and larger objects such as galaxies. ... Luminosity has different meanings in several different fields of science. ... The solar luminosity, , is a unit of luminosity (power emitted in the form of photons) conventionally used by astronomers to give the luminosities of stars. ... In thermodynamics, temperature is the physical property of a system that underlies the common notions of hot and cold —something that is hotter has the greater temperature. ... The kelvin (symbol: K) is the SI unit of temperature, and is one of the seven SI base units. ... In astronomy, the metallicity of an object is the proportion of its matter made up of chemical elements other than hydrogen and helium. ... A sphere rotating around its axis. ... The Pleiades, an open cluster of stars in the constellation of Taurus. ... A year is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ... In astronomy, many stars are referred to simply by catalogue numbers. ... There are very few or no other articles that link to this one. ... In astronomy, many stars are referred to simply by catalogue numbers. ... In astronomy, many stars are referred to simply by catalogue numbers. ... The Henry Draper Catalogue is an astronomy catalogue with astrometric and spectroscopic data about more than 225,000 stars. ... The Smithsonian Astrophysical Observatory (SAO) is a research institute of the Smithsonian Institution headquartered in Cambridge, Massachusetts, where it is joined with the Harvard College Observatory (HCO) to form the Harvard-Smithsonian Center for Astrophysics (CfA). ... In astronomy, many stars are referred to simply by catalogue numbers. ... SIMBAD (the Set of Identifications, Measurements, and Bibliography for Astronomical Data) is a database of astronomical information about objects within the Milky Way. ... Alpha (uppercase Α, lowercase α) is the first letter of the Greek alphabet. ... Orion is a remarkable constellation, visible from most places on the globe at one time or another during the year. ... Scorpius (Latin for scorpion, symbol , Unicode ♏) is one of the constellations of the zodiac. ... Bright stars can be bright because they produce more light, because they are closer to us, or both. ... Comparison between Aldebaran and the Sun Aldebaran, (α Tau / α Tauri / Alpha Tauri), is the brightest star in the constellation Taurus and one of the brightest stars in the nighttime sky. ... Spica (α Vir / α Virginis / Alpha Virginis) is the brightest star in the constellation Virgo, and one of the brightest stars in the nighttime sky. ... Regulus (α Leo / α Leonis / Alpha Leonis) is the brightest star in the constellation Leo and one of the brightest stars in the nighttime sky. ... The plane of the ecliptic is well seen in this picture from the 1994 lunar prospecting Clementine spacecraft. ... Comparison between Aldebaran and the Sun Aldebaran, (α Tau / α Tauri / Alpha Tauri), is the brightest star in the constellation Taurus and one of the brightest stars in the nighttime sky. ... Indo-European Zodiac signs, 16th century , medieval woodcuts The term zodiac (from Greek zodiakos [kyklos], circle of little animals, from zodiaion, the diminutive of zoon animal) denotes several places where a circle of twelve animals occurs. ...

Contents


Antares in ancient cultures

Antares' name derives from the Greek ανταρης, meaning "(holds) against Ares (Mars)", due to the similarity of its reddish hue to the appearance of the planet Mars. This distinctive coloration has made the star an object of interest to many societies throughout history. According to ancient Arab tradition, Antares is the warrior-poet Antar's star. Many of the old Egyptian temples are oriented so that the light of Antares plays a role in the ceremonies performed there. Some writers claim that it is the "lance star" referred to in the Biblical book of Job. Antares was also known as Satevis in ancient Persia and was one of the four "royal stars" of the Persians around 3000 BC. It is also known as Jyeshtha in ancient India. In the religion of Stregheria, Antares is a fallen angel and quarter guardian of the western gate. In astrology Antares is one of the Behenian fixed stars and has the symbol Image:Agrippa1531 corScorpii.png. In Greek mythology, Ares (battle strife; in Greek, Άρης)[1] is the Olympian god of war and son of Zeus (king of the gods) and Hera. ... Red is any of a number of similar colors at the lowest frequencies of light discernible by the human eye. ... Mars is the fourth planet from the Sun in the solar system, named after the Roman god of war (the counterpart of the Greek Ares), on account of its blood red color as viewed in the night sky. ... Color is an important part of the visual arts. ... The Arabs (Arabic: عرب ) are predominantly speakers of the Arabic language, rather than a pure ethnic group, mainly found throughout the Middle East and North Africa. ... Antara Ibn Shaddād al-Absi عنترة بن شداد العبسي, born in Laiwa (now Liwa in the Rub al Khali desert in United Arab Emirates) was a pre-Islamic Arab hero and poet (fl. ... The Angkor Wat Hindu temple in Cambodia is the largest in the world. ... For other uses, see Bible (disambiguation). ... To meet Wikipedias quality standards, this article or section may require cleanup. ... The four Royal stars or Guardians of the Sky were a group of stars noticed by the Persian astrologers around 3000 BC and used as a rudimentary season calendar. ... Motto: Persian: Esteqlāl, āzādÄ«, jomhÅ«rÄ«-ye eslāmÄ« (English: Independence, freedom, (the) Islamic Republic)[citation needed] Anthem: SorÅ«d-e MellÄ«-e Īrān Capital Tehran Largest city Tehran Official language(s) Persian (Farsi) Government Islamic Republic  - Supreme Leader Ali Khamenei  - President Mahmoud Ahmadinejad Revolution Overthrew Monarchy... Ways of the Strega published in 1994, described Raven Grimassis view of Stregheria and popularized Italian-based religious witchcraft. ... Statue of the Fallen Angel, Retiro Park (Madrid, Spain) A fallen angel in Abrahamic traditions is an angel that has been exiled or banished from Heaven. ... The Behenian fixed stars are a selection of fifteen stars considered especially useful for magical applications in the medieval astrology of Europe and the Arab world. ... Image File history File links Agrippa1531_corScorpii. ...


Properties

Antares is a class M supergiant star, with a diameter of approximately 1.33 × 109 km, or if in place of our sun, it would slightly more than encompass the average orbit of Jupiter, and is approximately 600 light years from earth. Visually, its luminosity is about 10,000 times that of the Sun but overall, taking into account that the star radiates a considerable part of its energy in the infrared part of the spectrum the luminosity equals roughly 65,000 times that of the Sun. The mass of the star is calculated to be 15 to 18 solar masses. Its large size and relatively small mass give Antares a very low density. In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral characteristics, and subsequently refined in terms of other characteristics. ... Supergiants are the most massive stars. ... To help compare different distances this page lists lengths starting at 1012 m (1000 million km). ... Scientific notation is a scheme for writing numbers that is often used by scientists and mathematicians to easily write large and small numbers. ... km redirects here. ... The Sun is the name given to the star of our solar system. ... Adjective Jovian Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ... A light year, abbreviated ly, is the distance light travels in one year: roughly 9. ... Luminosity has different meanings in several different fields of science. ... The Sun is the name given to the star of our solar system. ... Image of a small dog taken in mid-infrared (thermal) light (false color) Infrared (IR) radiation is electromagnetic radiation of a wavelength longer than that of visible light, but shorter than that of radio waves. ... In most modern usages of the word spectrum, there is a unifying theme of between extremes at either end. ... In astronomy, the solar mass is a unit of mass used to express the mass of stars and larger objects such as galaxies. ...


The best time to view Antares is on or around May 31 of each year, when the star is at "opposition" to the Sun. At this time, Antares rises at dusk and sets at dawn, and is thus in view all night (this of course depends entirely on your own position on the globe). For approximately two to three weeks on either side of November 30, Antares is not visible at all, being lost in the Sun's glare; this period of invisibility is longer in the Northern Hemisphere than in the Southern Hemisphere, since the star's declination is a few degrees south of the ecliptic. May 31 is the 151st day of the year in the Gregorian calendar (152nd in leap years), with 214 days remaining. ... The Sun is the name given to the star of our solar system. ... November 30 is the 334th day (335th on leap years) of the year in the Gregorian Calendar, with 31 days remaining. ... Insert non-formatted text here The Northern Hemisphere is the half of a planets surface (or celestial sphere) that is north of the equator (the word hemisphere literally means half ball). On the Earth, the Northern Hemisphere contains most of the land and population. ... Southern Hemisphere The Southern Hemisphere is the half of a planets surface (or celestial sphere) that is south of the equator (the word hemisphere literally means half ball). On Earth it contains five continents (Antarctica, Australia, most of South America, parts of Africa, and Asia) as well as four... In astronomy, declination (dec) is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. ...


Companion Star

Antares has a hot blue companion star (Antares B) at a distance of about 2.9″. Although it is 5th magnitude, it is normally difficult to see because of Antares' glare, but can be observed with a small telescope for a few seconds during lunar occultations while Antares itself is hidden by the Moon; it was discovered during one such occultation on April 13, 1819. The orbital period is 878 years. Binary star A binary star system consists of two stars both orbiting around their barycenter. ... 50 cm refracting telescope at Nice Observatory. ... In this July, 1997 still frame captured from video, the bright star Aldebaran has just reappeared on the dark limb of the waning crescent moon in this predawn occultation. ... Bulk composition of the moons mantle and crust estimated, weight percent Oxygen 42. ... April 13 is the 103rd day of the year in the Gregorian calendar (104th in leap years). ... 1819 common year starting on Friday (see link for calendar). ... The orbital period is the time it takes a planet (or another object) to make one full orbit. ...


Position on the Ecliptic

Of the 21 first-magnitude stars, Antares now lies further in angular distance from any first-magnitude star than any other first magnitude star, i.e. you could draw the largest circle centered around Antares without including any other first-magnitude star inside that circle. The nearest first-magnitude star to Antares is Alpha Centauri, lying approximately 39°6.75′ away. The high proper motion of Alpha Centauri is gradually increasing this angle. Before about March 2000, Achernar and Fomalhaut held this distinction. Alpha Centauri (α Cen / α Centauri) is the brightest star system (a triple star system) in the southern constellation of Centaurus, and contains the fourth brightest star in the night sky, with an apparent visual magnitude of −0. ... The proper motion of a star is the motion of the position of the star in the sky (the change in direction in which we see it, as opposed to the radial velocity) after eliminating the improper motions of the stars, which affect their measured coordinates but are not real... Alpha Centauri (α Cen / α Centauri) is the brightest star system (a triple star system) in the southern constellation of Centaurus, and contains the fourth brightest star in the night sky, with an apparent visual magnitude of −0. ... The position of Achernar Achernar (Alpha Eridani) is a bright supergiant star visible in the southern part of the night sky in the constellation of Eridanus in the Milky Way. ... Fomalhaut (α PsA / α Piscis Austrini / Alpha Piscis Austrini) is the brightest star in the constellation Piscis Austrinus and one of the brightest stars in the nighttime sky. ...


References in popular culture

The provinces or landskap were the subdivisions of Sweden until 1634, when they were replaced by the counties of Sweden (län). ... is a historical province (landskap) in southern Sweden. ... 1971 (MCMLXXI) was a common year starting on Friday (the link is to a full 1971 calendar). ... Apollo 14 was the eighth manned mission in the Apollo program and the third mission to land on the Moon. ... Description Role: Lunar landing Crew: 2; CDR, LM pilot Dimensions Height: 20. ... Star Trek is an American science-fiction franchise spanning six television series, ten feature films, hundreds of novels, computer and video games, and other fan stories. ... // Andromeda class Known Andromeda class starships: U.S.S. Drake - registry number NCC-70956 Ambushed by a Klingon battle group in 2373. ... Earth & Beyond was a science fiction massively multiplayer online role-playing game (MMORPG) developed by Westwood Studios and published by Electronic Arts. ...

See also

Star systems of planets orbiting a star other than the Sun are frequently found as locations in works of science fiction. ...

External links


  Results from FactBites:
 
Antares - Wikipedia, the free encyclopedia (703 words)
Antares (α Scorpii / Alpha Scorpii) is the brightest star in the constellation Scorpius and one of the brightest stars in the nighttime sky.
In the religion of Stregheria, Antares is a fallen angel and quarter guardian of the western gate.
Antares is a symbol for the Swedish historical province of Småland.
  More results at FactBites »

 
 

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