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  The Closest Extrasolar Planet
  Last update: October 15 2008

 
 
  • "The closest extrasolar planets. A giant planet around the M4 dwarf GL 876"
     X. Delfosse, T. Forveille, M. Mayor, C. Perrier, D. Naef, D. Queloz, 1998
     A&A 338, L67 (ADS)
  • Independant discovery: "A Planetary Companion to a Nearby M4 Dwarf, Gliese 876"
     G.W. Marcy, R.P. Butler, S.S. Vogt, D.A. Fischer, J.J Lissauer, 1998
     ApJ 505, L147 (ADS)
  • Gl 876 c discovery paper: "A Pair of Resonant Planets Orbiting GJ 876"
     G.W. Marcy, R.P. Butler, D.A. Fischer, S.S. Vogt, J.J Lissauer, E.J. Rivera, 2001
     ApJ 556, 296 (ADS)
  • Gl 876 d discovery paper: "A ~7.5 M_Earth Planet Orbiting the Nearby Star, GJ 876"
     E.J Rivera, J.J Lissauer, R.B Butler, G.W. Marcy, S.S. Vogt, D.A. Fischer, T. Brown, G. Laughlin, G.W. Henry, 2005
     ApJ 634, 625 (ADS)

    •  

    Larger image (307 kb)


  • Orbital solution (from Delfosse et al. 1998):

    Object
    Period
    (days)
    T0
    (JD - 2 400 000)
    Eccentricity
    V
    (km/s)
    Omega
    (deg)
    K1
    (km/s)
    m2sini
    (M_Jup)
    a
    (AU)
    N
    Residuals (Coralie)
    (m/s)
    Residuals (Elodie)
    (m/s)
    GL 876
    60.97 +/- 0.19
    50661.7 +/- 1.5
    0.336 +/- 0.019
    -1.902 +/- 0.006
    5.2 +/- 4.8
    0.248 +/- 0.0066
    2.0
    0.2
    32
    23
    16


  • Stellar properties:

    Parameter
    Value
    Reference
    Sp. Type
    M4V
    -
    pi (mas)
    212.69
    Hipparcos
    d (pc)
    4.7
    Hipparcos
    m_v (mag)
    10.16
    Hipparcos
    B-V (mag)
    1.597
    Hipparcos
    T_eff (K)
    ~3200
    -
    M_v (mag)
    11.8
    -
    L (L_sol)
    0.014
    -
    log(g) (CGS)
    -
    -
    M_1 (M_sol)
    ~0.3
    -
    log(R'HK)
    -
    -
    P_rot (d)
    -
    -
    Vsini (km/s)
    <2.0
    Delfosse et al. 1998
    Age (Gyr)
    -
    -
    [Fe/H]
    -
    -


  • Links:

  • Gliese 876 at OHP (english version) or Gliese 876 à l'OHP (french version)

  • Gliese 876 @ exoplanets.org


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    stephane.udry@obs.unige.ch