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A Jovian planet around GJ 777 A
(HD 190360 A)


Last update: March the 6th 2005

  • "The ELODIE survey for northern extra-solar planets II: A Jovian planet on a long-period orbit around GJ 777A"
    D. Naef, M. Mayor, S.G. Korzennik, D. Queloz, S. Udry, P. Nisenson, R.W. Noyes, T.M. Brown, J.-L. Beuzit, C. Perrier, J.-P. Sivan, 2003
    A&A 410, 1051 (ADS)
  • Announced during the "Scientific Frontiers in Research on Extrasolar Planets" conference, Washington D.C., June the 19th 2002





  • Elodie data: red filled circles; AFOE data: green open circles
    Top: Temporal Elodie and AFOE radial velocities
    Black curve: best Keplerian fit
    Blue dotted curve: circular orbit
    Bottom: Residuals to the eccentric orbit.
    Higher resolution image (408 kb)


  • Orbital solution (from Naef et al. 2003):

    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)
    GJ 777 A
    3902 +/- 1758
    50557 +/- 89
    0.48 +/- 0.2
    -45.350 +/- 0.004
    361 +/- 13
    20 +/- 3
    1.33
    4.8
    56 (Elodie)
    +
    13 (AFOE)
    9.3


  • Stellar properties:

    Parameter
    Value
    Reference
    Sp. Type
    G6IV
    Hipparcos
    pi (mas)
    62.92
    Hipparcos
    d (pc)
    15.9
    Hipparcos
    m_v (mag)
    5.73
    Hipparcos
    B-V (mag)
    0.749
    Hipparcos
    T_eff (K)
    5590 +/- 50
    Santos et al. 2003
    M_v (mag)
    4.72
    -
    L (L_sol)
    1.13
    -
    log(g) (CGS)
    4.48 +/- 0.15
    Santos et al. 2003
    M_1 (M_sol)
    0.96
    Santos et al. 2003
    log(R'HK)
    -5.05
    Duncan et al. 1991
    P_rot (d)
    38
    Naef et al. 2003
    Vsini (km/s)
    0.91
    Elodie, Naef et al. 2003
    Age (Gyr)
    6.7
    Naef et al. 2003
    [Fe/H]
    0.25
    Santos et al. 2003


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    stephane.udry@obs.unige.ch