| http://dbpedia.org/ontology/abstract
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HD 21447，又名BD+54 684，SAO 24064、HR 1046，是一颗恒星，视星等为5.09，位于銀經144.14，銀緯-0.75，其B1900.0坐标为赤經3h 22m 22.4s，赤緯+55° -0.75′ 21″。
, HD 21447 is a probable binary star system … HD 21447 is a probable binary star system located in the constellation Camelopardalis. The star is also known as HR 1046. It can be viewed with the naked eye, having an apparent visual magnitude of 5.09. Based upon an annual parallax shift of 16.42±0.29 mas, it is located some 199 light years from the Sun. It is a candidate for membership in the Ursa Major Moving Group. The primary component is A-type main-sequence star with a stellar classification of A1 Va. It is around 146 million years old and is spinning with a projected rotational velocity of 182 km/s. The star has an estimated 2.32 times the mass of the Sun and about 1.9 times the Sun's radius. It is radiating around 32 times the Sun's luminosity from its photosphere at an effective temperature of 10,049 K. The companion is visual magnitude 9.4 star at an angular separation of 14.8″..4 star at an angular separation of 14.8″.
, HD 21447 är en vit stjärna i huvudserien i Giraffens stjärnbild.. Stjärnan har visuell magnitud +5,09 och är synlig för blotta ögat vid normal seeing.
, HD 21447 (D Camelopardalis) é uma estrela … HD 21447 (D Camelopardalis) é uma estrela na direção da Camelopardalis. Possui uma ascensão reta de 03h 30m 00.23s e uma declinação de +55° 27′ 06.6″. Sua magnitude aparente é igual a 5.09. Considerando sua distância de 191 anos-luz em relação à Terra, sua magnitude absoluta é igual a 1.25. Pertence à classe espectral A1V.l a 1.25. Pertence à classe espectral A1V.
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| rdfs:comment |
HD 21447 is a probable binary star system … HD 21447 is a probable binary star system located in the constellation Camelopardalis. The star is also known as HR 1046. It can be viewed with the naked eye, having an apparent visual magnitude of 5.09. Based upon an annual parallax shift of 16.42±0.29 mas, it is located some 199 light years from the Sun. It is a candidate for membership in the Ursa Major Moving Group.membership in the Ursa Major Moving Group.
, HD 21447，又名BD+54 684，SAO 24064、HR 1046，是一颗恒星，视星等为5.09，位于銀經144.14，銀緯-0.75，其B1900.0坐标为赤經3h 22m 22.4s，赤緯+55° -0.75′ 21″。
, HD 21447 är en vit stjärna i huvudserien i Giraffens stjärnbild.. Stjärnan har visuell magnitud +5,09 och är synlig för blotta ögat vid normal seeing.
, HD 21447 (D Camelopardalis) é uma estrela … HD 21447 (D Camelopardalis) é uma estrela na direção da Camelopardalis. Possui uma ascensão reta de 03h 30m 00.23s e uma declinação de +55° 27′ 06.6″. Sua magnitude aparente é igual a 5.09. Considerando sua distância de 191 anos-luz em relação à Terra, sua magnitude absoluta é igual a 1.25. Pertence à classe espectral A1V.l a 1.25. Pertence à classe espectral A1V.
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HD 21447
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