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| http://dbpedia.org/ontology/abstract | HD 105382，又名CD-49 6813，SAO 239687、HR 4618，是一颗恒星，视星等为4.47，位于銀經295.94，銀緯11.62，其B1900.0坐标为赤經12h 2m 54.3s，赤緯-50° 11.62′ 15″。 , HD105382 — хімічно пекулярна зоря спектрального класу B5, що має видиму зоряну величину в смузі V приблизно 4,5.Вона розташована на відстані близько 375,8 світлових років від Сонця. , HD 105382 é uma estrela na constelação de … HD 105382 é uma estrela na constelação de Centaurus. É relativamente brilhante com uma magnitude aparente visual de 4,47, mas pode não ser visível a olho nu devido à sua proximidade com δ Centauri. Com base em medições de paralaxe pela sonda Gaia, está a uma distância de aproximadamente 355 anos-luz (109 parsecs) da Terra. Esta estrela é classificada como uma gigante de classe B com um tipo espectral de B6III. Tem uma massa de 5,7 vezes a massa solar e um raio 3 vezes maior que o raio solar. Está irradiando energia de sua fotosfera com cerca de 1 000 vezes a luminosidade solar a uma temperatura efetiva de 17 400 K, o que dá à estrela a coloração azul-branca típica de estrelas de classe B. Uma estrela variável, a magnitude visual de HD 105382 varia com amplitude de 0,012 ao longo de um período único de 1,295 dias. A estrela já foi considerada erroneamente uma estrela Be, o que explicaria a variabilidade como pulsações estelares, mas essa classificação provavelmente foi resultado de observação acidental da estrela Be próxima δ Centauri. Um estudo de 2004 mostrou que o período de 1,295 dias corresponde ao período de rotação da estrela, e que a variabilidade é causada por distribuição heterogênea de elementos na superfície estelar. Em particular, HD 105382 é uma estrela peculiar pobre em hélio cuja concentração desse elemento em sua superfície varia entre 0,5% e 15% da concentração solar, e a concentração de silício varia entre 0,00044% e 0,0069% da solar. As regiões da superfície com mais hélio parecem coincidir com as regiões de menos silício, e vice-versa. HD 105382 tem um campo magnético com intensidade polar de 2,3 kG, o que provavelmente está relacionado à superfície heterogênea da estrela. Medições astrométricas pela sonda Hipparcos identificaram anomalias no movimento próprio desta estrela, indicando que ela é uma provável binária astrométrica. Além disso, HD 105382 tem um movimento semelhante e parece estar à mesma distância que δ Centauri, da qual está separada por 267 segundos de arco, indicando que podem formar um sistema estelar triplo, junto com HD 105383, outra estrela próxima. Considerando que δ Centauri é por sua vez uma estrela binária, este pode ser um sistema com cinco estrelas no total. O sistema pertence ao subgrupo Centaurus Inferior-Crux (LCC) da , a associação OB mais próxima do Sol. da , a associação OB mais próxima do Sol. , HD 105382 (also known as V863 Centauri) is … HD 105382 (also known as V863 Centauri) is a star in the constellation Centaurus. Its apparent magnitude is 4.47. From parallax measurements, it is located 130 parsecs (440 light years) from the sun. HD 105382 is a variable star whose apparent magnitude varies with an amplitude of 0.012 over a period of 1.295 days. It has been previously classified as a Be star, which would explain the variability as stellar pulsations, but this classification was probably due to accidental observation of the nearby Be star δ Centauri. A 2004 study showed that the 1.295 day period is actually the rotation period of the star, and that the variability is caused by non-homogeneous distribution of elements in the stellar surface. In particular, HD 105382 is a helium-weak chemically peculiar star with a helium abundance varying between 0.5% and 15% of the solar abundance, and a silicon abundance varying between 0.00044% and 0.0069% the solar value. Regions with more helium appear to coincide with the regions with less silicon, and vice versa. This peculiar abundance pattern is probably related to HD 105382's magnetic field, which has a polar strength of 2.3 kG. From astrometric measurements by the Hipparcos spacecraft, HD 105382 is identified as a probable astrometric binary. It is only 267" away from δ Centauri, and both stars appear to be at the same distance from Earth and have the same motion through space, so they may be related. In total, this may be a five star system. It is a member of the Lower Centaurus–Crux (LCC) subgroup of the Scorpius–Centaurus association.oup of the Scorpius–Centaurus association. |
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| http://dbpedia.org/property/absmagBol | −2.9 ± 0.4 |
| http://dbpedia.org/property/appmagV | 4.47 |
| http://dbpedia.org/property/bV | −0.15 |
| http://dbpedia.org/property/class | B6III |
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| http://dbpedia.org/property/epoch | J2000 |
| http://dbpedia.org/property/gravity | 4.18 |
| http://dbpedia.org/property/luminosity | 1000 |
| http://dbpedia.org/property/mass | 5.7 |
| http://dbpedia.org/property/pError | 0.61 |
| http://dbpedia.org/property/parallax | 7.44 |
| http://dbpedia.org/property/propMoDec | −6.47 |
| http://dbpedia.org/property/propMoRa | −35.16 |
| http://dbpedia.org/property/radialV | 16.5 |
| http://dbpedia.org/property/radius | 3 |
| http://dbpedia.org/property/rotation | 86.39999999999999 |
| http://dbpedia.org/property/rotationalVelocity | 90 |
| http://dbpedia.org/property/temperature | 17400 |
| http://dbpedia.org/property/uB | −0.67 |
| http://dbpedia.org/property/variable | rotating variable |
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| rdfs:comment | HD105382 — хімічно пекулярна зоря спектрального класу B5, що має видиму зоряну величину в смузі V приблизно 4,5.Вона розташована на відстані близько 375,8 світлових років від Сонця. , HD 105382，又名CD-49 6813，SAO 239687、HR 4618，是一颗恒星，视星等为4.47，位于銀經295.94，銀緯11.62，其B1900.0坐标为赤經12h 2m 54.3s，赤緯-50° 11.62′ 15″。 , HD 105382 é uma estrela na constelação de … HD 105382 é uma estrela na constelação de Centaurus. É relativamente brilhante com uma magnitude aparente visual de 4,47, mas pode não ser visível a olho nu devido à sua proximidade com δ Centauri. Com base em medições de paralaxe pela sonda Gaia, está a uma distância de aproximadamente 355 anos-luz (109 parsecs) da Terra.mente 355 anos-luz (109 parsecs) da Terra. , HD 105382 (also known as V863 Centauri) is … HD 105382 (also known as V863 Centauri) is a star in the constellation Centaurus. Its apparent magnitude is 4.47. From parallax measurements, it is located 130 parsecs (440 light years) from the sun. HD 105382 is a variable star whose apparent magnitude varies with an amplitude of 0.012 over a period of 1.295 days. It has been previously classified as a Be star, which would explain the variability as stellar pulsations, but this classification was probably due to accidental observation of the nearby Be star δ Centauri. A 2004 study showed that the 1.295 day period is actually the rotation period of the star, and that the variability is caused by non-homogeneous distribution of elements in the stellar surface. In particular, HD 105382 is a helium-weak chemically peculiar star with a helium ak chemically peculiar star with a helium |
| rdfs:label | HD 105382 , HD105382 |
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