AH Scorpii

AH Scorpii
Datos de observación
(Época J2000,0)
Constelación Escorpio
Ascensión recta (α) 17h11m12.021s
Declinación (δ) −32° 19′ 30.7132″
Mag. aparente (V) 6.5 - 9.6
Características físicas
Clasificación estelar M4-5 Ia-Iab
Tipo M4III
Masa solar ~ 30 M
Radio (1,411 ± 124[1]​ R)
Magnitud absoluta −5.8
Luminosidad 330,000 L
Temperatura superficial 3,682 ± 190 K
Variabilidad SRc (variable semirregular)
Astrometría
Velocidad radial -13.40 ± 2.40 km/s
Distancia 7,400 años luz (2,260 pc)
Paralaje −0.09 ± 0.57 mas
Referencias
SIMBAD enlace
Otras designaciones
AH Scorpii, AN 223.1907, GSC 07365-00527, HD 155161, HIP 84071, CD−32°12429, 2MASS J17111702-3219308, IRC−30282, IRAS 17080-3215, RAFGL 1927, AAVSO 1704-32

AH Scorpii es una estrella hipergigante roja ubicada en la constelación de Escorpio, es una de las estrellas más grandes conocidas en la actualidad.

Características físicas

AH Scorpii es una estrella variable semirregular con un período principal de 714 días.

El rango total de magnitud visual es 6.5 - 9.6, no se han detectado largos períodos secundarios, tiene un índice de color BV de 2.39. Actualmente la estrella se encuentra rodeada por una nube de polvo estelar compuesta por máseres de SiO, H2O y OH.[2]

Tamaño

En el año 2012 los astrónomos del Very Large Telescope midieron los parámetros de tres hipergigantes en la región del centro de la Vía Láctea, siendo UY Scuti, AH Scorpii y KW Sagittarii.[3]

AH Scorpii resultó ser la tercera estrella más grande de las tres, siendo sobrepasada por KW Sagittarii con una diferencia de casi 50 radios solares.

Visibilidad

La estrella no es visible a simple vista, sin embargo es posible observarla con un prismático de 7x50.[4]

Véase también

Referencias

  1. https://www.aanda.org/articles/aa/abs/2013/06/aa20920-12/aa20920-12.html
  2. Chen, Xi; Shen, Zhi-Qiang (10 de julio de 2008). «VLBI Observations of SiO Masers around AH Scorpii». The Astrophysical Journal 681 (2): 1574-1583. ISSN 0004-637X. doi:10.1086/588186. Consultado el 12 de agosto de 2018. 
  3. Arroyo-Torres, B.; Wittkowski, M.; Marcaide, J. M.; Hauschildt, P. H. (2013-06). «The atmospheric structure and fundamental parameters of the red supergiants AH Scorpii, UY Scuti, and KW Sagittarii». Astronomy & Astrophysics (en inglés) 554: A76. ISSN 0004-6361. doi:10.1051/0004-6361/201220920. Consultado el 12 de agosto de 2018. 
  4. «AH Scorpii, HD155161, HIP84071». Universe Guide. Consultado el 12 de agosto de 2018. 

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