Английская Википедия:Delta Trianguli
Шаблон:Short description Шаблон:Starbox begin Шаблон:Starbox image Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox visbin Шаблон:Starbox detail Шаблон:Starbox catalog Шаблон:Starbox reference Шаблон:Starbox end
Delta Trianguli, Latinized from Delta Tri, is a spectroscopic binary star system approximately Шаблон:Convert away in the constellation of Triangulum. The primary star is a yellow dwarf, while the secondary star is thought to be an orange dwarf. It has an apparent magnitude of +4.87 and forms an optical (line-of-sight) triple with Gamma Trianguli and 7 Trianguli.[1]
Stellar components
Delta Trianguli A is a main sequence star with a stellar classification of G0V and a mass similar to the Sun.[1] The spectral characteristics of the smaller companion Delta Trianguli B are not well determined since the close orbit makes observations difficult,[2] with estimates of the spectral class ranging from G9V to K4V.[3] The Delta Trianguli stars orbit their center of mass with an estimated separation of 0.106 AU;[1] it is certainly less than one AU.[3] The orbital period is 10.02 days and the eccentricity of the orbit is only 0.020. The orbit is inclined about 167° to the line of sight from Earth.[4]
A 2008 search for a tertiary companion to this system using an adaptive optics system on the VLT proved unsuccessful.[5] Examination of the system in infrared light at 70 μm shows no excess emission that would otherwise indicate the presence of a disk of orbiting dust.[3]
Naming
In Chinese, Шаблон:Lang (Шаблон:Lang), meaning Heaven's Great General, refers to an asterism consisting of δ Trianguli γ Andromedae, φ Persei, 51 Andromedae, 49 Andromedae, χ Andromedae, υ Andromedae, τ Andromedae, 56 Andromedae, β Trianguli and γ Trianguli. Consequently, the Chinese name for δ Trianguli itself is Шаблон:Lang (Шаблон:Lang, Шаблон:Lang-en.).[6]
See also
References
External links
- ↑ 1,0 1,1 1,2 Ошибка цитирования Неверный тег
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- Английская Википедия
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