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- Alpha_Trianguli_Australis abstract "Alpha Trianguli Australis (α TrA, α Trianguli Australis) is the brightest star in the southern circumpolar constellation Triangulum Australe, forming an apex of a triangle with Beta and Gamma Trianguli Australis that gives the constellation its name (Latin for southern triangle). This star has the traditional name Atria, which is merely a contraction of its Bayer designation. In traditional Chinese it is called 三角形三 (Mandarin: sān jiǎo xín sān), the Third Star of the Triangle.Alpha Trianguli Australis is a bright giant star with an apparent magnitude of +1.91. Based upon parallax measurements, this star is located roughly 391 light-years (120 parsecs) distant from the Earth. The estimated age of the star is 48 million years old; sufficiently old for a massive star to evolve away from the main sequence and expand into a giant. It has a mass roughly seven times the mass of the Sun, but is emitting about 5,500 times the Sun's luminosity. The effective temperature of the star's outer envelope is 4,150 K, which gives it the characteristic orange hue of a K-type star. With a diameter 130 times that of our sun, it would almost reach the orbit of Venus if placed at the centre of our solar system. The proper name Atria is a contraction of its Bayer designation.There is evidence that Atria may be a binary star. It displays unusual properties for a star of its class, including stellar flares and a higher than normal emission of X-rays. These can be explained by a young, magnetically active companion with a stellar classification of about G0 V. Such a star would have a mass similar to the Sun, with an orbital period of at least 130 years. Young, G-type stars have a high temperature corona and frequently emit flares causing sudden increases in luminosity. The pair may be separated by about 50 Astronomical Units.".
- Alpha_Trianguli_Australis thumbnail Triangulum_Australe_IAU.svg?width=300.
- Alpha_Trianguli_Australis wikiPageExternalLink atria.html.
- Alpha_Trianguli_Australis wikiPageID "2696243".
- Alpha_Trianguli_Australis wikiPageRevisionID "590549681".
- Alpha_Trianguli_Australis absmagV "–3.68".
- Alpha_Trianguli_Australis appmagV "1.91".
- Alpha_Trianguli_Australis bV "+1.44".
- Alpha_Trianguli_Australis class "K2 IIb-IIIa".
- Alpha_Trianguli_Australis constell Triangulum_Australe.
- Alpha_Trianguli_Australis epoch "J2000".
- Alpha_Trianguli_Australis gravity "1.5".
- Alpha_Trianguli_Australis hasPhotoCollection Alpha_Trianguli_Australis.
- Alpha_Trianguli_Australis luminosity "5500".
- Alpha_Trianguli_Australis mass "7".
- Alpha_Trianguli_Australis metalFe "–0.06".
- Alpha_Trianguli_Australis pError "0.15".
- Alpha_Trianguli_Australis parallax "8.35".
- Alpha_Trianguli_Australis propMoDec "–31.58".
- Alpha_Trianguli_Australis propMoRa "17.99".
- Alpha_Trianguli_Australis radialV "–3.3".
- Alpha_Trianguli_Australis temperature "4150".
- Alpha_Trianguli_Australis uB "+1.56".
- Alpha_Trianguli_Australis subject Category:Bayer_objects.
- Alpha_Trianguli_Australis subject Category:Henry_Draper_Catalogue_objects.
- Alpha_Trianguli_Australis subject Category:Hipparcos_objects.
- Alpha_Trianguli_Australis subject Category:K-type_bright_giants.
- Alpha_Trianguli_Australis subject Category:Triangulum_Australe.
- Alpha_Trianguli_Australis type Animal100015388.
- Alpha_Trianguli_Australis type BayerObjects.
- Alpha_Trianguli_Australis type Giant101323781.
- Alpha_Trianguli_Australis type HIPObjects.
- Alpha_Trianguli_Australis type HenryDraperCatalogueObjects.
- Alpha_Trianguli_Australis type K-typeBrightGiants.
- Alpha_Trianguli_Australis type LivingThing100004258.
- Alpha_Trianguli_Australis type Object100002684.
- Alpha_Trianguli_Australis type Organism100004475.
- Alpha_Trianguli_Australis type PhysicalEntity100001930.
- Alpha_Trianguli_Australis type Whole100003553.
- Alpha_Trianguli_Australis type CelestialBody.
- Alpha_Trianguli_Australis type Star.
- Alpha_Trianguli_Australis type PhysicalBody.
- Alpha_Trianguli_Australis comment "Alpha Trianguli Australis (α TrA, α Trianguli Australis) is the brightest star in the southern circumpolar constellation Triangulum Australe, forming an apex of a triangle with Beta and Gamma Trianguli Australis that gives the constellation its name (Latin for southern triangle). This star has the traditional name Atria, which is merely a contraction of its Bayer designation.".
- Alpha_Trianguli_Australis label "Alfa Trianguli Australis".
- Alpha_Trianguli_Australis label "Alpha Trianguli Australis".
- Alpha_Trianguli_Australis label "Alpha Trianguli Australis".
- Alpha_Trianguli_Australis label "Alpha Trianguli Australis".
- Alpha_Trianguli_Australis label "Atria (estrella)".
- Alpha_Trianguli_Australis label "Atria (ster)".
- Alpha_Trianguli_Australis label "Atria".
- Alpha_Trianguli_Australis label "Atria".
- Alpha_Trianguli_Australis label "Альфа Южного Треугольника".
- Alpha_Trianguli_Australis label "みなみのさんかく座アルファ星".
- Alpha_Trianguli_Australis label "三角形三".
- Alpha_Trianguli_Australis sameAs Atria.
- Alpha_Trianguli_Australis sameAs Atria_(estrella).
- Alpha_Trianguli_Australis sameAs Alpha_Trianguli_Australis.
- Alpha_Trianguli_Australis sameAs Alfa_Trianguli_Australis.
- Alpha_Trianguli_Australis sameAs みなみのさんかく座アルファ星.
- Alpha_Trianguli_Australis sameAs 아트리아.
- Alpha_Trianguli_Australis sameAs Atria_(ster).
- Alpha_Trianguli_Australis sameAs Atria.
- Alpha_Trianguli_Australis sameAs Alpha_Trianguli_Australis.
- Alpha_Trianguli_Australis sameAs m.07yjlx.
- Alpha_Trianguli_Australis sameAs Q14242.
- Alpha_Trianguli_Australis sameAs Q14242.
- Alpha_Trianguli_Australis sameAs Alpha_Trianguli_Australis.
- Alpha_Trianguli_Australis wasDerivedFrom Alpha_Trianguli_Australis?oldid=590549681.
- Alpha_Trianguli_Australis depiction Triangulum_Australe_IAU.svg.
- Alpha_Trianguli_Australis isPrimaryTopicOf Alpha_Trianguli_Australis.
- Alpha_Trianguli_Australis name "Alpha Trianguli Australis".