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HD 17156

HD 17156
Datos d'observación
(Dómina J2000.0)
Constelación Cassiopeia
Ascensión reuta (α) 02h 49m 44.49s
Declinación (δ) +71° 45′ 11.64″
Mag. aparente (V) 8.17
Carauterístiques físiques
Clasificación estelar G0IV
Magnitú absoluta 3.70
Astrometría
Distancia 255.19 años lluz (78.24 pc)
Otres designaciones
BD+71°171, HIP 13192, SAO 4737
[editar datos en Wikidata]

HD 17156 ye una estrella perteneciente a la constelación de Cassiopeia, que tien siquier un planeta estrasolar orbitándola. Basáu nel so magnitú absoluta de 3.70 y la so tipu espectral G0, ye una estrella subxigante, lo que significa que la estrella ye más caliente que'l Sol, y hai casi consumíu la totalidá del hidróxenu del so nucleu estelar. La so magnitú aparente ye 8.17, por o que nun puede ser reparada a güeyu desnudu, pero puede ser acolumbrada utilizando binoculares Alcuéntrase a 255.19 años lluz del nuesu sol.

Ye 20% más masivo que'l nuesu sol, y el so radiu ye un 47% mayor. basáu n'observaciones de la so cromósfera, créese que ye 110 millones d'años más vieya que'l Sol.

Ye la primer estrella de la constelación de Cassiopeia que tien un planeta estrasolar, HD 17156b, que afayóse en 2007.

Sistema Planetariu de HD 17156[1][2]
Planetes
(n'orde dende la estrella)
Masa
(M)
Semiexe mayor
(UA)
Periodu orbital
(díes)
Escentricidá Radiu
b 3.191 ± 0.033 0.16243 21.2163979 ± 0.0000159 0.6768 ± 0.0034 --
c (por confirmar) 0.063 0.481 111.314 0.136 --

Ver tamién

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  • Llista d'estrelles con planetes estrasolares

Referencies

[editar | editar la fonte]

Enllaces esternos

[editar | editar la fonte]

Coordenaes: Sky map 2h 49m 44.487s, 71° 45 11.629

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HD 17156
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