RSGC1-F01

RSGC-F01
Description de cette image, également commentée ci-après
Image infrarouge de l'amas RSGC1 par le Spitzer.
RSGC-F01 se situe au centre de l'amas RSGC1
Données d'observation
(époque J2000)
Ascension droite 18h 37m 56,3094100824s
Déclinaison −06° 52′ 32,171348136″
Constellation Écu de Sobieski

Localisation dans la constellation : Écu de Sobieski

(Voir situation dans la constellation : Écu de Sobieski)
Caractéristiques
Type spectral M3I
Astrométrie
Mouvement propre μα = −4,569 mas/a
μδ = −5,074 mas/a
Parallaxe 0,917 6 ± 0,581 6 mas
Distance 22 000 ± 2 900 al
Caractéristiques physiques
Rayon 1 530 R
Luminosité 335 000 ± 380 000 L
Température 3 550 K

Désignations

2MASS J18375629-0652322 TIC 6841341

RSGC1-F01 est une supergéante rouge[1] se situant dans l'amas ouvert RSGC1 dans la constellation de l'Écu de Sobieski[2]. En 2022, elle est l'une des plus grandes étoiles connues, son rayon a été calculé à 1 530 R☉ (le rayon a été calculé avec la méthode de la loi de Stefan-Boltzmann[3])[source insuffisante]. Ce rayon correspond à un volume de 3,58 milliards de fois celui du Soleil[réf. nécessaire]. Si l'étoile était placée dans le système solaire à la place du Soleil, sa photosphère engloutirait le système solaire jusqu'à l'orbite de Jupiter.

Articles connexes

Références

  1. « 2MASS J18375629-0652322 », sur simbad.cds.unistra.fr (consulté le )
  2. « Stellarium Web Online Star Map », sur stellarium-web.org (consulté le )
  3. Roberta M. Humphreys, Greta Helmel, Terry J. Jones et Michael S. Gordon, « Exploring the Mass Loss Histories of the Red Supergiants », The Astronomical Journal, vol. 160, no 3,‎ , p. 145 (ISSN 1538-3881, DOI 10.3847/1538-3881/abab15, lire en ligne, consulté le )

Sources externes

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