HD 129456

c1 Centauri
Dados observacionais (J2000)
Constelação Centaurus
Asc. reta 14h 43m 39,4s[1]
Declinação -35° 10′ 25,2″[1]
Magnitude aparente 4,05[1]
Características
Tipo espectral K3III[1]
Cor (B-V) 1,35[1]
Astrometria
Velocidade radial -38,10 km/s[1]
Mov. próprio (AR) -61,46 mas/a[1]
Mov. próprio (DEC) -176,84 mas/a[1]
Paralaxe 15,57 ± 0,16 mas[1]
Distância 209 ± 2 anos-luz
64,2 ± 0,7 pc
Magnitude absoluta 0,05
Detalhes
Massa 1,44[2] M☉
Raio 23,4[3] R☉
Gravidade superficial log g = 1,86 cgs[2]
Luminosidade 171,99[4] L☉
Temperatura 4278[4] K
Outras denominações
c1 Centauri, CD-34 9868, FK5 544, HR 5485, HD 129456, HIP 72010, SAO 205871.[1]
HD 129456

HD 129456 (c1 Centauri) é uma estrela na constelação de Centaurus. Tem uma magnitude aparente visual de 4,05,[1] sendo visível a olho nu em locais sem poluição luminosa excessiva. Com base em medições de paralaxe pelo satélite Hipparcos, está localizada a uma distância de 209 anos-luz (64,2 parsecs) da Terra.[1]

Esta estrela é uma gigante de classe K com um tipo espectral de K3III,[1] indicando que é uma estrela evoluída que já consumiu todo o hidrogênio em seu núcleo e abandonou a sequência principal. Com uma massa de 1,44 vezes a massa solar,[2] a estrela expandiu-se para um raio de 23,4 vezes o solar,[3] calculado com base em um diâmetro angular de 3,39 ± 0,09 milissegundos de arco.[5] Está irradiando 170 vezes a luminosidade solar de sua fotosfera a uma temperatura efetiva de 4 280 K,[4] conferindo-lhe a coloração alaranjada típica de estrelas de classe K.[6] Não possui estrelas companheiras conhecidas.[7]

Ver também

Referências

  1. ↑ a b c d e f g h i j k l m «SIMBAD query result - c01 Cen». SIMBAD. Centre de Données astronomiques de Strasbourg. Consultado em 28 de maio de 2017 
  2. ↑ a b c Allende Prieto, C.; Lambert, D. L. (dezembro de 1999). «Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures». Astronomy and Astrophysics. 352: 555-562. Bibcode:1999A&A...352..555A 
  3. ↑ a b Lang, Kenneth R. (2006), Astrophysical formulae, ISBN 3-540-29692-1, Astronomy and astrophysics library, 1 3 ed. , Birkhäuser . O raio (R*) é dado por:
  4. ↑ a b c McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (novembro de 2012). «Fundamental parameters and infrared excesses of Hipparcos stars». Monthly Notices of the Royal Astronomical Society. 427 (1): 343-357. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x 
  5. ↑ Richichi, A.; Percheron, I.; Khristoforova, M (fevereiro de 2005). «CHARM2: An updated Catalog of High Angular Resolution Measurements». Astronomy and Astrophysics. 431: 773-777. Bibcode:2005A&A...431..773R. doi:10.1051/0004-6361:20042039 
  6. ↑ «The Colour of Stars». Australia Telescope, Outreach and Education. Commonwealth Scientific and Industrial Research Organisation. 21 de dezembro de 2004. Consultado em 28 de maio de 2017 
  7. ↑ Eggleton, P. P.; Tokovinin, A. A. (setembro de 2008). «A catalogue of multiplicity among bright stellar systems». Monthly Notices of the Royal Astronomical Society. 389 (2): 869-879. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x 

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