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  A 14 Earth-masses companion to HD 4308
  Last update: June the 3rd 2006

 
 
 
 
 
 
  • "The HARPS search for southern extra-solar planets. V. A 14 Earth-masses planet orbiting HD 4308"
    S. Udry, M. Mayor, W. Benz, J.-L. Bertaux, F. Bouchy, C. Lovis, C. Mordasini, F. Pepe, D. Queloz, J.-P. Sivan, 2006
    A&A 447, 361 (ADS)
  • Announced during the Colloquium "The Tenth Anniversary of 51 Peg b" at Observatoire de Haute-Provence, August the 22nd 2005

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    Larger image


  • Orbital solution (from Udry et al. 2006):

    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 4308
    15.56 +/- 0.02
    53314.70 +/- 2.0
    0.00 +/- 0.01
    95.2457 +/- 0.0002
    359 +/- 47
    4.07 +/- 0.2
    0.0442
    0.115
    41
    1.3


  • Stellar properties:

    Parameter
    Value
    Reference
    Sp. Type
    G5V
    Hipparcos
    pi (mas)
    45.76
    Hipparcos
    d (pc)
    21.85
    Hipparcos
    m_v (mag)
    6.54
    Hipparcos
    B-V (mag)
    0.65
    Hipparcos
    T_eff (K)
    5685 +/- 13
    Udry et al. 2006
    M_v (mag)
    4.85
    -
    L (L_sol)
    0.99
    -
    log(g) (CGS)
    4.49 +/- 0.07
    Udry et al. 2006
    M_1 (M_sol)
    0.83 +/- 0.01
    Udry et al. 2006
    log(R'HK)
    -4.93
    Udry et al. 2006
    P_rot (d)
    24
    Udry et al. 2006
    Vsini (km/s)
    1.2
    Udry et al. 2006
    Age (Gyr)
    4.3
    Udry et al. 2006
    [Fe/H]
    -0.31 +/- 0.01
    Udry et al. 2006


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    stephane.udry@obs.unige.ch