Epsilon Delphini

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Pour les articles homonymes, voir Epsilon (homonymie).

ε Delphini
Données d'observation
(époque J2000.0)
Ascension droite 20h 33m 12,772s[1]
Déclinaison +11° 18′ 11,74″[2]
Constellation Dauphin
Magnitude apparente +4,03[3]

Localisation dans la constellation : Dauphin

(Voir situation dans la constellation : Dauphin)
Caractéristiques
Type spectral B6III[3]
Indice U-B −0,47[3]
Indice B-V −0,13[3]
Indice R-I −0,11[3]
Variabilité suspectée[4]
Astrométrie
Vitesse radiale −19,4 ± 0,7 km/s[5]
Mouvement propre μα = +11,96 mas/a[2]
μδ = −28,97 mas/a[2]
Parallaxe 9,87 ± 0,21 mas[2]
Distance 330 ± 7 al
(101 ± 2 pc)
Magnitude absolue −1,00[6]

Désignations

Aldulfin, Deneb Dulfim, Deneb el Delphinus, ε Drl, 2 Del, HR 7852, HD 195810, SAO 106230, HIP 101421, BD+10°4321, FK5 768, NSV 13137[7]

modifier

Epsilon Delphini (ε Del / ε Delphini) est une étoile géante bleue-blanche située à environ 330 années-lumière dans la constellation du Dauphin. Elle porte également le nom traditionnel Deneb Dulfim qui signifie en arabe « la queue du Dauphin », tandis que l'Union astronomique internationale a officialisé le nom d'Aldulfin pour désigner l'étoile le [8]. L'étoile est suspectée d'être variable, et pourrait occasionnellement briller jusqu'à la magnitude 3,95[4].

Notes et références

  1. ↑ (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).
  2. ↑ a b c et d (en) F. van Leeuwen, « Validation of the new Hipparcos reduction », Astronomy & Astrophysics, vol. 474, no 2,‎ , p. 653–664 (DOI 10.1051/0004-6361:20078357, Bibcode 2007A&A...474..653V, arXiv 0708.1752)
  3. ↑ a b c d et e (en) D. Hoffleit et W. H. Warren, « Bright Star Catalogue, 5e éd. », Catalogue de données en ligne VizieR : V/50. Publié à l'origine dans : 1964BS....C......0H, vol. 5050,‎ (Bibcode 1995yCat.5050....0H)
  4. ↑ a et b (en) N. N . Samus', E. V. Kazarovets et al., « General Catalogue of Variable Stars: NSV and supplement », Astronomy Reports, vol. 61, no 1,‎ , p. 80 (DOI 10.1134/S1063772917010085, Bibcode 2017ARep...61...80S)
  5. ↑ (en) G. A. Gontcharov, « Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system », Astronomy Letters, vol. 32, no 11,‎ , p. 759 (DOI 10.1134/S1063773706110065, Bibcode 2006AstL...32..759G, arXiv 1606.08053)
  6. ↑ (en) E. Anderson et Ch. Francis, « XHIP: An extended Hipparcos compilation », Astronomy Letters, vol. 38, no 5,‎ , p. 331 (DOI 10.1134/S1063773712050015, Bibcode 2012AstL...38..331A, arXiv 1108.4971)
  7. ↑ (en) * eps Del -- Variable Star sur la base de données Simbad du Centre de données astronomiques de Strasbourg.
  8. ↑ (en) « Naming Stars », sur IAU.org, Union astronomique internationale (consulté le )

Voir aussi

Articles connexes

Liens externes

v · m
Étoiles de la constellation du Dauphin
Bayer
Flamsteed
Étoiles variables
HR
Autres
Liste d'étoiles du Dauphin

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