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Statements

Subject Item
dbr:HD_157661
rdf:type
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rdfs:label
HD 157661 HD 157661 HD 157661 HD 157661
rdfs:comment
HD 157661，又名CD-4511531，SAO 227971、HR 6477，是一颗恒星，视星等为5.29，位于銀經343.72，銀緯-5.94，其B1900.0坐标为赤經17h 19m 28.8s，赤緯-45° -5.94′ 12″。 HD 157661 is the Henry Draper Catalogue designation for a likely triple star in the southern constellation of Ara. With a measured annual parallax of 5.13 mas, is located at a distance of approximately 640 light-years (200 parsecs) from Earth. The combined apparent visual magnitude of the stars is 5.29, which means it is faintly visible to the naked eye. HD 157661 é uma estrela tripla na constelação de Ara. Com uma paralaxe de 5,13 milissegundos de arco, está localizada a uma distância de aproximadamente 640 anos-luz (190 parsecs) da Terra. A magnitude aparente combinada das estrelas é de 5,29, o que significa que é visível a olho nu em boas condições de visualização. HD 157661 är en sannolik trippelstjärna belägen i den norra delen av stjärnbilden Altaret. Den har en kombinerad skenbar magnitud av ca 5,29 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 5,1 mas, beräknas den befinna sig på ett avstånd på ca 640 ljusår (ca 190 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 8 km/s.
foaf:name
HD 157661
dct:subject
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1079519263
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dbo:wikiPageExternalLink
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dbp:appmagV
5.29
dbp:bV
–0.07
dbp:class
B7V + B9.5V + A0V
dbp:constell
dbr:Ara_(constellation)
dbp:epoch
J2000
dbp:pError
0.72
dbp:parallax
5.13
dbp:propMoDec
–27.91
dbp:propMoRa
–6.46
dbp:rI
–0.03
dbp:radialV
+8
dbp:uB
–0.34
dbo:abstract
HD 157661 é uma estrela tripla na constelação de Ara. Com uma paralaxe de 5,13 milissegundos de arco, está localizada a uma distância de aproximadamente 640 anos-luz (190 parsecs) da Terra. A magnitude aparente combinada das estrelas é de 5,29, o que significa que é visível a olho nu em boas condições de visualização. Os dois combonentes mais brilhantes do sistema são um par de estrelas de classe B da sequência principal. A estrela mais brilhante tem uma magnitude de 5,70 e uma classificação estelar de B7 V. A uma distância de 2,115 segundos de arco está o segundo componente, que tem magnitude 6,46 e uma classificação de B9.5 V. O terceiro membro do sistema é uma estrela de classe A de magnitude 7,6 a uma separação de 103 segundos de arco. HD 157661，又名CD-4511531，SAO 227971、HR 6477，是一颗恒星，视星等为5.29，位于銀經343.72，銀緯-5.94，其B1900.0坐标为赤經17h 19m 28.8s，赤緯-45° -5.94′ 12″。 HD 157661 är en sannolik trippelstjärna belägen i den norra delen av stjärnbilden Altaret. Den har en kombinerad skenbar magnitud av ca 5,29 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 5,1 mas, beräknas den befinna sig på ett avstånd på ca 640 ljusår (ca 190 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 8 km/s. HD 157661 is the Henry Draper Catalogue designation for a likely triple star in the southern constellation of Ara. With a measured annual parallax of 5.13 mas, is located at a distance of approximately 640 light-years (200 parsecs) from Earth. The combined apparent visual magnitude of the stars is 5.29, which means it is faintly visible to the naked eye. The inner components of this system consist of a pair of B-type main sequence stars. The brighter star has a magnitude of 5.70 and a stellar classification of B7 V. At an angular separation of 2.115 arcseconds is the magnitude 6.46 secondary component, which has a classification of B9.5 V. A third member of the system is a 7.6 magnitude A-type star at a separation of 103 arcseconds.
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