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HD 102964 ( eller HR 4546) är en ensam stj … HD 102964 ( eller HR 4546) är en ensam stjärna i den mellersta delen av stjärnbilden Kentauren som också har Bayer-beteckningen B Centauri. Den har en skenbar magnitud av ca 4,47 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 2 på ca 7,4 mas, beräknas den befinna sig på ett avstånd på ca 440 ljusår (ca 135 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 2 km/s.eliocentrisk radialhastighet på ca 2 km/s.
, HD 102964 (B Centauri) é uma estrela na co … HD 102964 (B Centauri) é uma estrela na constelação de Centaurus. Tem uma magnitude aparente visual de 4,46, sendo visível a olho nu em locais sem poluição luminosa excessiva. Com base em medições de paralaxe, está localizada a aproximadamente 440 anos-luz (135 parsecs) da Terra. É uma das estrelas observadas pela sonda Hipparcos com a menor variação de magnitude, com amplitude não maior que 0,01. Esta estrela é uma gigante de classe K com um tipo espectral de K3III, indicando que é uma estrela evoluída que já consumiu todo o hidrogênio em seu núcleo e abandonou a sequência principal. Está irradiando 426 vezes a luminosidade solar de sua fotosfera a uma temperatura efetiva de 4 500 K, conferindo à estrela coloração alaranjada típica de estrelas de classe K. Seu raio, calculado com base em um diâmetro angular de 2,538 ± 0,004 milissegundos de arco, é equivalente a 36 vezes o raio solar. Não possui estrelas companheiras conhecidas.o possui estrelas companheiras conhecidas.
, HD 102964, also known as B Centauri, is a … HD 102964, also known as B Centauri, is a single star in the southern constellation of Centaurus. It has the identifier HD 102964 in the Henry Draper catalogue; B Centauri is the star's Bayer designation. This object has an orange hue and is faintly visible to the naked eye with an apparent visual magnitude of +4.47. The star is located at a distance of approximately 440 light years from the Sun based on parallax, and has an absolute magnitude of −1.14. This object is an aging giant star with a stellar classification of K3III, indicating the star has exhausted the supply of hydrogen at its core then cooled and expanded off the main sequence. At present it has 39 times the girth of the Sun. It is radiating 480 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,325 K.re at an effective temperature of 4,325 K.
, HD 102964，又名CD-44 7614，SAO 223062、HR 4546，是一颗恒星，视星等为4.46，位于銀經291.92，銀緯16.4，其B1900.0坐标为赤經11h 46m 8.6s，赤緯-44° 16.4′ 1″。
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| rdfs:comment |
HD 102964 (B Centauri) é uma estrela na co … HD 102964 (B Centauri) é uma estrela na constelação de Centaurus. Tem uma magnitude aparente visual de 4,46, sendo visível a olho nu em locais sem poluição luminosa excessiva. Com base em medições de paralaxe, está localizada a aproximadamente 440 anos-luz (135 parsecs) da Terra. É uma das estrelas observadas pela sonda Hipparcos com a menor variação de magnitude, com amplitude não maior que 0,01.gnitude, com amplitude não maior que 0,01.
, HD 102964, also known as B Centauri, is a … HD 102964, also known as B Centauri, is a single star in the southern constellation of Centaurus. It has the identifier HD 102964 in the Henry Draper catalogue; B Centauri is the star's Bayer designation. This object has an orange hue and is faintly visible to the naked eye with an apparent visual magnitude of +4.47. The star is located at a distance of approximately 440 light years from the Sun based on parallax, and has an absolute magnitude of −1.14.x, and has an absolute magnitude of −1.14.
, HD 102964，又名CD-44 7614，SAO 223062、HR 4546，是一颗恒星，视星等为4.46，位于銀經291.92，銀緯16.4，其B1900.0坐标为赤經11h 46m 8.6s，赤緯-44° 16.4′ 1″。
, HD 102964 ( eller HR 4546) är en ensam stj … HD 102964 ( eller HR 4546) är en ensam stjärna i den mellersta delen av stjärnbilden Kentauren som också har Bayer-beteckningen B Centauri. Den har en skenbar magnitud av ca 4,47 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 2 på ca 7,4 mas, beräknas den befinna sig på ett avstånd på ca 440 ljusår (ca 135 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 2 km/s.eliocentrisk radialhastighet på ca 2 km/s.
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HD 102964
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