R Cassiopeiae

R de Cassiopée

R Cassiopeiae
Description de cette image, également commentée ci-après
Courbe de lumière de R Cassiopeiae en bande visible, tracée à partir des données de l'AAVSO[1]
Données d'observation
(époque J2000.0)
Ascension droite 23h 58m 24,8683s[2]
Déclinaison +51° 23′ 19,713″[2]
Constellation Cassiopée
Magnitude apparente 4,4 à 13,5[3]

Localisation dans la constellation : Cassiopée

(Voir situation dans la constellation : Cassiopée)
Caractéristiques
Type spectral M6e-M10e[3]
Indice U-B +0,08[4]
Indice B-V +1,83[4]
Variabilité Mira[3]
Astrométrie
Vitesse radiale −22,94 ± 0,72 km/s[5]
Mouvement propre μα = +82,847 ± 0,189 mas/a[2]
μδ = +17,485 ± 0,203 mas/a[2]
Parallaxe 5,742 3 ± 0,201 1 mas[2]
Distance 174,146 ± 6,098 7 pc (∼568 al)[6]
Caractéristiques physiques
Masse 0,59 M☉[7]
Rayon 263-310 R☉[7],[8]
Luminosité 3 837 L☉[7]
Température 2 812 K[7]

Désignations

R Cas, HR 9066, HD 224490, HIP 118188, BD+50°4202, SAO 35938, ADS 17135, CCDM J23584 +5123[6]

modifier

R Cassiopeiae est une étoile variable de la constellation de Cassiopée.

R Cassiopeiae est une étoile géante rouge de type spectral M6 à M10. C'est une étoile variable de type Mira et sa luminosité varie entre les magnitudes 4,7 et 13.5 sur une période de 430,5 jours[3]. Elle est distante d'environ ∼ 570 a.l. (∼ 175 pc) de la Terre[2] et elle se rapproche du système solaire avec une vitesse radiale de −23 km/s[5].

Notes et références

  1. ↑ (en) « Download Data », sur aavso.org, AAVSO (consulté le )
  2. ↑ a b c d e et f (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.
  3. ↑ a b c et d (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)
  4. ↑ a et b (en) J. R. Ducati, « VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system », CDS/ADC Collection of Electronic Catalogues, 2237, 0,‎ (Bibcode 2002yCat.2237....0D)
  5. ↑ a et b (en) B. Famaey et al., « Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters », Astronomy & Astrophysics, vol. 430,‎ , p. 165–186 (DOI 10.1051/0004-6361:20041272, Bibcode 2005A&A...430..165F, arXiv astro-ph/0409579)
  6. ↑ a et b (en) V* R Cas -- Variable Star of Mira Cet type sur la base de données Simbad du Centre de données astronomiques de Strasbourg.
  7. ↑ a b c et d (en) Mine Takeuti et al., « A Method to Estimate the Masses of Asymptotic Giant Branch Variable Stars », Publications of the Astronomical Society of Japan, vol. 65, no 3,‎ , p. 60 (DOI 10.1093/pasj/65.3.60, Bibcode 2013PASJ...65...60T)
  8. ↑ (en) E. de Beck et al., « Probing the mass-loss history of AGB and red supergiant stars from CO rotational line profiles. II. CO line survey of evolved stars: derivation of mass-loss rate formulae », Astronomy & Astrophysics, vol. 523,‎ , article no A18 (DOI 10.1051/0004-6361/200913771, Bibcode 2010A&A...523A..18D, arXiv 1008.1083)

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