Английская Википедия:Beta Trianguli
Шаблон:Short description Шаблон:Distinguish Шаблон:Starbox begin Шаблон:Starbox image Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox orbit Шаблон:Starbox detail Шаблон:Starbox catalog Шаблон:Starbox reference Шаблон:Starbox end
Beta Trianguli (Beta Tri, β Trianguli, β Tri) is the Bayer designation for a binary star[1] system in the constellation Triangulum, located about 127 light years from Earth.[2] Although it is only a third-magnitude star,[3] it is the brightest star in the constellation Triangulum.[4]
This is a double-lined spectroscopic binary star system with an orbital period of 31.39 days and an eccentricity of 0.53.[5] The members are separated by a distance of less than 5 AU.[6] The primary component has a stellar classification of A5IV, indicating that it has evolved away from the main sequence and is now a subgiant star. However, the classification is uncertain and not consistent with the mass derived from the orbit.[7] It is among the least variable of the stars that were observed by the Hipparcos spacecraft, with a magnitude varying by only 0.0005.[8]
Based on observations using the Spitzer Space Telescope, as reported in 2005, this system is emitting an excess of infrared radiation. This emission can be explained by a circumbinary ring of dust. The dust is emitting infrared radiation at a blackbody temperature of 100 K.[6] It is thought to extend from 50 to 400 AU away from the stars.[7]
Naming
- In combination with Alpha Trianguli, these stars were called Al Mīzān, which is Arabic for "The Scale Beam".[4]
- In Chinese, Шаблон:Lang (Шаблон:Lang), meaning Heaven's Great General, refers to an asterism consisting of β Trianguli, γ Andromedae, φ Persei, 51 Andromedae, 49 Andromedae, χ Andromedae, υ Andromedae, τ Andromedae, 56 Andromedae, γ Trianguli and δ Trianguli. Consequently, the Chinese name for β Trianguli itself is Шаблон:Lang (Шаблон:Lang, Шаблон:Lang-en.).[9]
References
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- Английская Википедия
- Bayer objects
- Flamsteed objects
- Triangulum
- Bright Star Catalogue objects
- Henry Draper Catalogue objects
- Hipparcos objects
- Durchmusterung objects
- A-type subgiants
- Spectroscopic binaries
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- Википедия
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