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    HD 168443

    HD 168443
    A Sun-like star in the constellation Serpens around which has been found a high-mass extrasolar planet (HD 168443 b) in a small orbit of very high eccentricity1 and a brown dwarf HD 168443 c) in a larger orbit at the edge of the star's habitable zone.2


    Host star
    Distance 123.5 light-years (37.88 pc)
    Spectral type G5IV
    Apparent magnitude 6.92
    Temperature 5,160 °C (5,430 K)
    Luminosity (Sun=1) 2.1
    Mass (Sun=1) 0.95
    Position RA 18h 20m 04.11s; Dec. -09° 35' 34.6"


    Planet: HD 168443 b
    Mass (Jupiter=1) 7.2 ± 0.4
    Semimajor axis 0.29 AU (43.5 million km, 27.0 million miles)
    Orbital period 58.1 days
    Eccentricity 0.53 ± 0.02
    Discovery 1998, Marcy et al.
    Method radial velocity


    Brown dwarf: HD 168443 c
    Mass (Jupiter=1) 34 ± 12
    Semimajor axis 2.87 AU (430 million km, 267 million miles)
    Orbital period 1740 ± 4 days
    Eccentricity 0.228 ± 0.005
    Discovery 2005, Marcy et al.
    Method radial velocity


    References
    1. Marcy, G. W., Butler, R. P, Vogt, S. S., Fischer, D., and Liu, M. C. "Two New Planets in Eccentric Orbits," Astrophysical Journal, 520, 239 (1999).
    2. Marcy, G., Butler, R., Vogt, S., Liu, M., Laughlin, G., Apps, K., Graham, J., Lloyd, J., Luhman, K., Jayawardhana, R. "Two Substellar Companions Orbiting HD 168443," Astrophysical Journal, 555, 418–425 (2005).

    Related categories

       • NOTABLE STARS
       • EXTRASOLAR PLANETS AND SUBSTELLAR OBJECTS





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