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Statements

Subject Item
dbr:Sigma_Draconis
dbo:wikiPageWikiLink
dbr:Tau_Draconis
Subject Item
dbr:Draco_in_Chinese_astronomy
dbo:wikiPageWikiLink
dbr:Tau_Draconis
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dbr:Tau_Draconis
Subject Item
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dbr:Tau_Draconis
Subject Item
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dbr:Tau_Draconis
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Tau Draconis Tau Draconis 御女一 Tau Draconis Tau Draconis
rdfs:comment
Tau Draconis, Latinized from τ Draconis, is an astrometric binary star system in the northern circumpolar constellation of Draco. The star is faintly visible to the naked eye, having an apparent visual magnitude of 4.45. Based upon an annual parallax shift of 22.28 mas as measured from Earth, it is located around 146 light years from the Sun. Its proper motion is propelling it across the sky at the rate of 0.176 arc seconds per year. Tau Draconis (60 Draconis) é uma estrela na direção da constelação de Draco. Possui uma ascensão reta de 19h 15m 33.29s e uma declinação de +73° 21′ 18.8″. Sua magnitude aparente é igual a 4.45. Considerando sua distância de 150 anos-luz em relação à Terra, sua magnitude absoluta é igual a 1.14. Pertence à classe espectral K3III. 天龍座τ，又名BD+73 857，HD 181984、SAO 9366、HR 7352，是天龍座的一颗恒星，视星等为4.45，位于銀經104.73，銀緯24.21，其B1900.0坐标为赤經19h 17m 28.6s，赤緯+73° 24.21′ 12″。 Tau Draconis (τ Dra / τ Draconis) adalah salah satu bintang pada rasi Draco . Bintang ini memiliki magnitudo 4.45 dan merupakan bintang dengan kelas K3III. Bintang ini berada pada jarak 150 tahun cahaya dari Bumi. Tau Draconis (τ Draconis, förkortat Tau Dra, τ Dra) som är stjärnans Bayerbeteckning, är en astrometrisk dubbelstjärna belägen i nordöstra delen av stjärnbilden Draken. Den har en skenbar magnitud på 4,45 och är svagt synlig för blotta ögat. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 22,3 mas, beräknas den befinna sig på ett avstånd av ca 143 ljusår (45 parsek) från solen. Dess egenrörelse driver den över himlen med en hastighet av 0,176 bågsekunder per år.
foaf:name
Tau Draconis
dcterms:subject
dbc:Henry_Draper_Catalogue_objects dbc:Durchmusterung_objects dbc:Bright_Star_Catalogue_objects dbc:Astrometric_binaries dbc:Bayer_objects dbc:K-type_giants dbc:Hipparcos_objects dbc:Draco_(constellation) dbc:Flamsteed_objects
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36846738
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1079520499
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+1.19
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6.48
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4.45
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dbp:class
K2 III:
dbp:constell
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J2000.0
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2
dbp:luminosity
48
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1.25
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22.28
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+103.23
dbp:propMoRa
−115.29
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−33.70
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8
dbp:uB
+1.45
dbo:abstract
Tau Draconis (τ Dra / τ Draconis) adalah salah satu bintang pada rasi Draco . Bintang ini memiliki magnitudo 4.45 dan merupakan bintang dengan kelas K3III. Bintang ini berada pada jarak 150 tahun cahaya dari Bumi. Tau Draconis (τ Draconis, förkortat Tau Dra, τ Dra) som är stjärnans Bayerbeteckning, är en astrometrisk dubbelstjärna belägen i nordöstra delen av stjärnbilden Draken. Den har en skenbar magnitud på 4,45 och är svagt synlig för blotta ögat. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 22,3 mas, beräknas den befinna sig på ett avstånd av ca 143 ljusår (45 parsek) från solen. Dess egenrörelse driver den över himlen med en hastighet av 0,176 bågsekunder per år. 天龍座τ，又名BD+73 857，HD 181984、SAO 9366、HR 7352，是天龍座的一颗恒星，视星等为4.45，位于銀經104.73，銀緯24.21，其B1900.0坐标为赤經19h 17m 28.6s，赤緯+73° 24.21′ 12″。 Tau Draconis (60 Draconis) é uma estrela na direção da constelação de Draco. Possui uma ascensão reta de 19h 15m 33.29s e uma declinação de +73° 21′ 18.8″. Sua magnitude aparente é igual a 4.45. Considerando sua distância de 150 anos-luz em relação à Terra, sua magnitude absoluta é igual a 1.14. Pertence à classe espectral K3III. Tau Draconis, Latinized from τ Draconis, is an astrometric binary star system in the northern circumpolar constellation of Draco. The star is faintly visible to the naked eye, having an apparent visual magnitude of 4.45. Based upon an annual parallax shift of 22.28 mas as measured from Earth, it is located around 146 light years from the Sun. Its proper motion is propelling it across the sky at the rate of 0.176 arc seconds per year. This is a K-type giant star with a stellar classification of K2 III:, where the semi-colon indicates some uncertainty about its spectral value. It is considered metal-rich star and is past the first dredge-up phase of its post-main sequence evolution, although it shows under-abundances of carbon and oxygen in its spectrum. The star has 1.25 times the mass of the Sun and is an estimated 6.48 billion years old. It is radiating 48 times the solar luminosity from its enlarged photosphere at an effective temperature of 4,413 K.
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