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Alpha Sculptoris

α Sculptoris
Données d'observation
(époque J2000.0)
Ascension droite 00h 58m 36,4s
Déclinaison −29° 21′ 27″
Constellation Sculpteur
Magnitude apparente +4,30

Localisation dans la constellation : Sculpteur

(Voir situation dans la constellation : Sculpteur)
Caractéristiques
Type spectral B7IIIp
Variabilité SX Arietis
Astrométrie
Distance 680 ± 120 al
(210 ± 40 pc)

Désignations

α Scl, HR 280, HD 5737, CD-30 297, CPD-30 99, HIP 4577, SAO 166176, FK5 35, GC 1172[1]

Alpha Sculptoris (α Scl / α Sculptoris) est l'étoile la plus brillante de la constellation du Sculpteur.

Alpha Sculptoris est une géante bleue-blanche de type spectral B7IIIp et de magnitude apparente +4,30. Elle est à environ 680 années-lumière de la Terre. C'est une variable de type SX Arietis et sa luminosité varie de 0,01 magnitude.

La luminosité de α Scl est égale à environ 1700 fois celle du Soleil tandis que sa température de surface vaut 14000 kelvins. Les calculs indiquent que le rayon de Alpha Sculptoris vaut 7 fois celui du Soleil et sa masse 5,5 fois celle du Soleil. Les variations spectrales observées furent un temps supposées dues à un trou noir en orbite mais sont attribuées maintenant à des variations chimiques dans son atmosphère[réf. nécessaire].

Notes et références

Liens externes

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