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  A planet orbiting HD 221287
  Last update: July 20 2007

 
 
 
 
 
 
  • The HARPS search for southern extra-solar planets. IX. Exoplanets orbiting HD 100777, HD 190647 and HD 221287
    D. Naef, M. Mayor, W. Benz, F. Bouchy, G. Lo Curto, C. Lovis, C. Moutou, F. Pepe, D. Queloz, N.C. Santos and S. Udry, 2007
    A&A 470, 721 (ADS)
  • Announced during the "Observing Planetary Systems" ESO Workshop held in Santiago, Chile (March 5-8th 2007)

  •  

    Larger image


  • Orbital solution (from Naef et al. 2007):

    Object
    Period
    (days)
    T0
    (JD - 2 400 000)
    Eccentricity
    V
    (km/s)
    Omega
    (deg)
    K1
    (m/s)
    m2sini
    (M_Jup)
    a
    (AU)
    N
    Residuals
    (m/s)
    HD 221287 b
    456.1
    +7.7/ -5.9
    53263
    +153/ -53
    0.08
    +0.17/ -0.05
    -21.858
    +0.008/ -0.005
    98
    +92/ -52
    71
    +18/ -8
    3.09
    +/- 0.79
    1.25
    +/- 0.04
    26
    8.5


  • Stellar properties:

    Parameter
    Value
    Reference
    Sp. Type
    F7V
    Hipparcos
    pi (mas)
    18.91
    Hipparcos
    d (pc)
    52.9
    Hipparcos
    m_v (mag)
    7.82
    Hipparcos
    B-V (mag)
    0.513
    Hipparcos
    T_eff (K)
    6304 +/- 45
    Naef et al. 2007
    M_v (mag)
    4.203
    Naef et al. 2007
    L (L_sol)
    1.66
    Naef et al. 2007
    log(g) (CGS)
    4.43 +/- 0.16
    Naef et al. 2007
    M_1 (M_sol)
    1.25 +/- 0.1
    Naef et al. 2007
    log(R'HK)
    -4.59
    Naef et al. 2007
    P_rot (d)
    4.9
    Naef et al. 2007
    Vsini (km/s)
    4.1 +/- 1.0
    Naef et al. 2007
    Age (Gyr)
    1.3
    Naef et al. 2007
    [Fe/H]
    0.03 +/- 0.05
    Naef et al. 2007


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    stephane.udry@obs.unige.ch