HD 13808

Cet article est une ébauche concernant une étoile.

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HD 13808
Données d'observation
(époque J2000.0)
Ascension droite 02h 12m 42,9256s[1]
Déclinaison −53° 44′ 38,013″[1]
Constellation Éridan
Magnitude apparente 8,38[2]

Localisation dans la constellation : Éridan

(Voir situation dans la constellation : Éridan)
Caractéristiques
Type spectral K2V[3]
Astrométrie
Vitesse radiale +41,026 km/s[4]
Mouvement propre μα = −107,923 mas/a[1]
μδ = +30,975 mas/a[1]
Parallaxe 35,393 8 ± 0,032 1 mas[1]
Distance 28,253 5 ± 0,025 6 pc (∼92,2 al)[1]
Caractéristiques physiques
Rayon 0,78 ± 0,02 R☉[1]
Luminosité 0,368 L☉[1]
Température 5 086 K[1]

Désignations

HD 13808, CD-54 471, CPD-54 432, SAO 232674, HIP 10301[5]

modifier

HD 13808 est une étoile naine orange située dans la constellation de l'Éridan.

Système planétaire

Deux exoplanètes sont en orbite autour de cette étoile, ce sont HD 13808 b et HD 13808 c, elles ont été découvertes en 2011[6],[7].

Caractéristiques des planètes du système HD 13808[6]
Planète Masse Demi-grand axe (ua) Période orbitale (jours) Excentricité Inclinaison Rayon
 b —  0,101 7 ± 0,001 6   14,182 ± 0,005   0,17 ± 0,07 
 c —  0,247 6 ± 0,004 1   53,832 ± 0,112 7   0,43 

Notes et références

  1. ↑ a b c d e f g h et i (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.
  2. ↑ (en) E. Høg et al., « The Tycho-2 catalogue of the 2.5 million brightest stars », Astronomy & Astrophysics, vol. 355,‎ , L27-L30 (DOI 10.1888/0333750888/2862, Bibcode 2000A&A...355L..27H)
  3. ↑ (en) R. O. Gray et al., « Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample », The Astronomical Journal, vol. 132, no 1,‎ , p. 161–170 (DOI 10.1086/504637, Bibcode 2006AJ....132..161G, arXiv astro-ph/0603770)
  4. ↑ (en) C. Soubiran et al., « Gaia Data Release 2. The catalogue of radial velocity standard stars », Astronomy & Astrophysics, vol. 616,‎ , p. 8, article no A7 (DOI 10.1051/0004-6361/201832795, Bibcode 2018A&A...616A...7S, arXiv 1804.09370)
  5. ↑ (en) HD 13808 -- High proper-motion Star sur la base de données Simbad du Centre de données astronomiques de Strasbourg.
  6. ↑ a et b (en) HD 13808 b sur L'Encyclopédie des planètes extrasolaires de l'Observatoire de Paris.
  7. ↑ (en) HD 13808 c sur L'Encyclopédie des planètes extrasolaires de l'Observatoire de Paris.

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