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Kepler-14

Kepler-14
Données d'observation
(époque J2000.0)
Ascension droite 19h 10m 50,110s[1]
Déclinaison +47° 19′ 58,87″[1]
Constellation Lyre
Magnitude apparente 12,12[2]

Localisation dans la constellation : Lyre

(Voir situation dans la constellation : Lyre)
Caractéristiques
Type spectral F[2]
Astrométrie
Mouvement propre μα = 1,0 mas/a[1]
μδ = −10,2 mas/a[1]
Distance ~ 3 200 al[3]
(~ 980 pc)
Caractéristiques physiques
Masse 1,512 ± 0,043 M[3]
Rayon 2,048+0,112
−0,084
 R[3]
Gravité de surface (log g) 3,994+0,028
−0,036
[3]
Luminosité 6,29+0,75
−0,58
 L[3]
Température 6 395 ± 60 K[3]
Métallicité [Fe/H] = 0,12 ± 0,06[3]
Rotation 7,9 ± 1,0 km/s[3]
Âge 2,2+0,2
−0,1
× 109 a[3]

Désignations

KOI-98, KIC 10264660, TYC 3546-413-1, 2MASS J19105011+4719589, WDS J19108 +4720AB[1]

Kepler-14 est une étoile binaire située à environ ∼ 3 200 a.l. (∼ 981 pc) du Système solaire, dans la constellation de la Lyre. Les deux composantes de ce système binaire sont deux étoiles distantes l'une de l'autre d'au moins 280 UA et orbitant l'une autour de l'autre en 2 800 ans environ[4]. Trop proches l'une de l'autre pour pouvoir être étudiées séparément, leurs propriétés résultantes ont été analysées ensemble et correspondent à un astre unique de 1,512 masse solaire et 2,048 rayons solaires de type spectral F et ayant une température effective de 6 395 K.

Système planétaire

Caractéristiques des planètes du système Kepler-14
Planète Masse Demi-grand axe (ua) Période orbitale (jours) Excentricité Inclinaison Rayon


 Kepler-14 b  8,4 MJ   6,790 123   0,035   1,14 RJ  

Kepler-14 b, une exoplanète de type Jupiter chaud, est détectée au printemps 2011 autour de Kepler-14 : cette planète, d'une masse de 8,4 masses joviennes pour une taille de 1,14 rayon jovien — soit une masse volumique d'environ 7,1 g·cm-3 — orbiterait en un peu moins de 6,8 jours à environ 0,078 UA de son étoile parente, avec une excentricité orbitale de l'ordre de 0,035.

Notes et références

  1. a b c d et e (en) Kepler-14 sur la base de données Simbad du Centre de données astronomiques de Strasbourg.
  2. a et b (en) Kepler-14 b sur L'Encyclopédie des planètes extrasolaires de l'Observatoire de Paris. (consulté le ).
  3. a b c d e f g h et i (en) NASA Ames Research Center Kepler, A Search for Habitable Planets « Kepler-14b ».
  4. (en) Lars A. Buchhave, David W. Latham, Joshua A. Carter, Jean-Michel Désert, Guillermo Torres, Elisabeth R. Adams, Stephen T. Bryson, David B. Charbonneau, David R. Ciardi, Craig Kulesa, Andrea K. Dupree, Debra A. Fischer, François Fressin, Thomas N. Gautier III, Ronald L. Gilliland, Steve B. Howell, Howard Isaacson, Jon M. Jenkins, Geoffrey W. Marcy, Donald W. McCarthy, Jason F. Rowe, Natalie M. Batalha, William J. Borucki, Timothy M. Brown, Douglas A. Caldwell, Jessie L. Christiansen, William D. Cochran, Drake Deming, Edward W. Dunham, Mark Everett, Eric B. Ford, Jonathan J. Fortney, John C. Geary, Forrest R. Girouard, Michael R. Haas, Matthew J. Holman, Elliott Horch, Todd C. Klaus, Heather A. Knutson, David G. Koch, Jeffrey Kolodziejczak, Jack J. Lissauer, Pavel Machalek, Fergal Mullally, Martin D. Still, Samuel N. Quinn, Sara Seager, Susan E. Thompson et Jeffrey Van Cleve, « KEPLER-14b: A MASSIVE HOT JUPITER TRANSITING AN F STAR IN A CLOSE VISUAL BINARY », The Astrophysical Journal Supplement Series, vol. 197, no 1,‎ , p. 3 (lire en ligne). « 1106.5510v1 », texte en accès libre, sur arXiv. DOI 10.1088/0067-0049/197/1/3

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