V743 Cassiopeiae

V743 Cassiopeiae
Description de cette image, également commentée ci-après
Image de V743 Cassiopée prise par le télescope spatial WISE
Données d'observation
(époque J2000.0)
Ascension droite 00h 20m 43,56309s[1]
Déclinaison +61° 52′ 46,5432″[1]
Constellation Cassiopée
Magnitude apparente 6,95[2]

Localisation dans la constellation : Cassiopée

(Voir situation dans la constellation : Cassiopée)
Caractéristiques
Type spectral M1Iab[3]
Magnitude apparente (J) 3,12[4]
Magnitude apparente (K) 1,75[2]
Indice U-B +2,11[2]
Indice B-V +2,02[2]
Indice R-I +1,30[2]
Variabilité SRc[5]
Astrométrie
Vitesse radiale −29,91 ± 0,27 km/s[1]
Mouvement propre μα = −1,455 mas/a[1]
μδ = −0,385 mas/a[1]
Parallaxe 0,864 9 ± 0,023 1 mas[1]
Distance 1 156 ± 31 pc (∼3 770 al)[6]
Caractéristiques physiques
Rayon 247 R[7]
Luminosité 10 973 L[7]
Température 3 745 ± 170 K[8]

Désignations

V743 Cas, HD 1613, HIP 1652, 2MASS J00204356+6152465, BD+61°43, GC 412, IRAS 00179 +6136, SAO 11123, TYC 4019-3948-1[6]

V743 Cassiopeiae (en abrégé V743 Cas), également désignée HD 1613, est une supergéante rouge de septième magnitude située dans la constellation de Cassiopée[6]. Elle se situe dans l'est de la constellation et elle est membre du bras de Persée[3]. D'après la mesure de sa parallaxe annuelle par le satellite Gaia, l'étoile est située à environ 1 156 pc (∼3 770 al) de la Terre[1]. Elle s'en rapproche à une vitesse radiale héliocentrique de −30 km/s[1].

Caractéristiques

V743 Cassiopeiae est une supergéante rouge de type spectral M1Iab[3]. C'est une variable semi-régulière de type SRc[5], dont la magnitude apparente varie autour de 6,95[2]. Dans le système photométrique d'Hipparcos, elle a été observée varier avec une amplitude de 0,1 magnitude[5]. Le rayon de l'étoile est estimé être 247 fois plus grand que le rayon solaire[7]. Elle est approximativement 11 000 fois plus lumineuse que le Soleil[7] et sa température de surface est d'environ 3 750 degrés Kelvin[8].

Voir aussi

Articles connexes

Lien externe

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Notes et références

  1. a b c d e f g et h (en) A. Vallenari et al. (Gaia collaboration), « Gaia Data Release 3 : Summary of the content and survey properties », Astronomy & Astrophysics, vol. 674,‎ , article no A1 (DOI 10.1051/0004-6361/202243940, Bibcode 2023A&A...674A...1G, arXiv 2208.00211). Notice Gaia DR3 pour cette source sur VizieR.
  2. a b c d e et f (en) J. R. Ducati, « Catalogue de données en ligne VizieR : Catalogue of Stellar Photometry in Johnson's 11-color system », CDS/ADC Collection of Electronic Catalogues, 2237, 0,‎ (Bibcode 2002yCat.2237....0D)
  3. a b et c R. Dorda, I. Negueruela et C. González-Fernández, « The red supergiant population in the Perseus arm », Monthly Notices of the Royal Astronomical Society, vol. 475,‎ , p. 2003–2015 (ISSN 0035-8711, DOI 10.1093/mnras/stx3317, Bibcode 2018MNRAS.475.2003D)
  4. (en) R. M. Cutri et al., « 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) », Catalogue de données en ligne VizieR : II/246. Publié à l'origine dans : 2003yCat.2246....0C,‎ (Bibcode 2003yCat.2246....0C, lire en ligne)
  5. a b et c (en) N. N. Samus', E. V. Kazarovets et al., « General Catalogue of Variable Stars: Version GCVS 5.1 », Astronomy Reports, vol. 61, no 1,‎ , p. 80-88 (DOI 10.1134/S1063772917010085, Bibcode 2017ARep...61...80S, lire en ligne)
  6. a b et c (en) HD 1613 -- Red Supergiant sur la base de données Simbad du Centre de données astronomiques de Strasbourg.
  7. a b c et d (en) A. G. A. Brown et al. (Gaia collaboration), « Gaia Data Release 2 : Summary of the contents and survey properties », Astronomy & Astrophysics, vol. 616,‎ , article no A1 (DOI 10.1051/0004-6361/201833051, Bibcode 2018A&A...616A...1G, arXiv 1804.09365). Notice Gaia DR2 pour cette source sur VizieR.
  8. a et b (en) M. Messineo et A. G. A. Brown, « A Catalog of Known Galactic K-M Stars of Class I Candidate Red Supergiants in Gaia DR2 », The Astronomical Journal, vol. 158, no 1,‎ , p. 15, article no 20 (DOI 10.3847/1538-3881/ab1cbd, Bibcode 2019AJ....158...20M, arXiv 1905.03744)

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