Pi Sculptoris

Pi Sculptoris
Datos de observación
(Época J2000.0)
Constelación Sculptor
Ascensión recta (α) 01h 42min 08,60s
Declinación (δ) -32° 19’ 17,1’’
Mag. aparente (V) +5,26
Características físicas
Clasificación estelar K0III
Masa solar 1,52 M☉
Radio (9 R☉)
Magnitud absoluta +1,15
Gravedad superficial 2,69 (log g)
Luminosidad 43 L☉
Temperatura superficial 4640 - 4707 K
Metalicidad [M/H] = -0,20
Astrometría
Velocidad radial 10,4 km/s
Distancia 215 ± 10 años luz
Paralaje 15,18 ± 0,70 mas
Sistema
N.º de componentes 2?
Referencias
SIMBAD enlace
NStED enlace
Otras designaciones
HD 10537 / HR 497 / HIP 7955 / SAO 193263 / CD-32 666
[editar datos en Wikidata]

Pi Sculptoris (π Scl)[1]​[2]​ es una estrella de la constelación de Sculptor. Tiene magnitud aparente +5,26 y se encuentra a 215 años luz de distancia del sistema solar.

Pi Sculptoris es una gigante naranja de tipo espectral K0III.[1]​ Con una temperatura superficial entre 4640 y 4707 K, su luminosidad equivale a la de 43 soles.[3]​ Tiene una masa un 52% mayor que la masa solar.[4]​ La medida de su diámetro angular en banda J —1,28 ± 0,02 milisegundos de arco—[5]​ permite evaluar su diámetro real, resultando ser unas 9 veces más grande que el diámetro solar, un tamaño comparable al de Pólux (β Geminorum) o al de Menkent (θ Centauri), dos de las gigantes naranjas más próximas a nosotros. La mayor distancia a la que se halla Pi Sculptoris —seis veces mayor que la de Pólux— hace que aparezca menos brillante que estas.

Pi Sculptoris muestra una metalicidad —abundancia relativa de elementos más pesados que el helio— inferior a la del Sol ([M/H] = -0,20). Igualmente, su abundancia relativa de hierro corresponde a un 60% de la solar ([Fe/H] = -0,22). Elementos como níquel, titanio y bario siguen la misma pauta mientras que, por el contrario, los contenidos de magnesio y sodio son semejantes a los del Sol. [4]​

Se piensa que Pi Sculptoris puede ser una estrella binaria, si bien nada se sabe sobre su posible acompañante.[6]​

Referencias

  1. ↑ a b HR 497 -- High proper-motion Star (SIMBAD)
  2. ↑ Pi Sculptoris Archivado el 4 de marzo de 2016 en Wayback Machine. (The Bright Star Catalogue)
  3. ↑ Pi Sculptoris. Extended Hipparcos Compilation (XHIP) (Anderson+, 2012)
  4. ↑ a b Liu, Y. J.; Zhao, G.; Shi, J. R.; Pietrzyński, G.; Gieren, W. (2007). «The abundances of nearby red clump giants». Monthly Notices of the Royal Astronomical Society 382 (2). pp. 553-566. 
  5. ↑ Richichi, A.; Percheron, I.; Khristoforova, M. (2005). «CHARM2: An updated Catalog of High Angular Resolution Measurements». Astronomy and Astrophysics 431 (4). pp. 773-777. 
  6. ↑ Eggleton, P. P.; Tokovinin, A. A. (2008). «A catalogue of multiplicity among bright stellar systems». Monthly Notices of the Royal Astronomical Society 389 (2). pp. 869-879. 

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