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HD 20868 b is an extrasolar planet located approximately 156 light-years away in the constellation of Fornax, orbiting the 10th magnitude K-type subgiant star HD 20868. This planet has a minimum mass of 1.99 times more than Jupiter and orbits at a distance of 0.947 AU. This planet takes 380.85 days or 12.5 months to revolve around the star with an eccentricity of 0.75, one of the most eccentric of any known extrasolar planets. At periastron, the distance is 0.237 AU and at apastron, the distance is 1.66 AU.

HD 20868 b
Discovery
Discovered byMoutou et al.[1]
Discovery siteLa Silla Observatory
Discovery dateOctober 26, 2008
Detection method
Doppler spectroscopy
(HARPS)
Orbital characteristics
Semi-major axis
0.947 ± 0.012 AU (141,700,000 ± 1,800,000 km)
Eccentricity0.75 ± 0.002
Orbital period (sidereal)
380.85 ± 0.09 d
1.0427 ± 0.0002 y
Average orbital speed
27.1
Time of periastron
2,454,451.52 ± 0.1
Argument of periastron
356.2 ± 0.4
StarHD 20868

    The planet HD 20868 b is named Baiduri. The name was selected in the NameExoWorlds campaign by Malaysia, during the 100th anniversary of the IAU. Baiduri means opal in Malay language.[2][3]

    This planet was discovered on October 26, 2008 by Moutou et al. using the HARPS spectrograph on ESO’s 3.6 meter telescope installed at La Silla Observatory in Atacama desert, Chile.[1]


    See also



    References


    1. Moutou, C.; et al. (2009). "The HARPS search for southern extra-solar planets XVII. Six long-period giant planets around BD -17 0063, HD 20868, HD 73267, HD 131664, HD 145377, HD 153950". Astronomy and Astrophysics. 496 (2): 513–519. arXiv:0810.4662. Bibcode:2009A&A...496..513M. doi:10.1051/0004-6361:200810941.
    2. "Approved names". NameExoworlds. Retrieved 2020-01-02.
    3. "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.



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    HD 20868 b es un planeta extrasolar que se encuentra aproximadamente a 159 años luz en la constelación de Fornax, orbitando la estrella de tipo K HD 20868. Este planeta orbita a una distancia de 0,947 UA. La distancia oscila entre los 0,237 AU y los 1,66 AU, lo que da una excentricidad de 0,75, siendo unos de los planetas extrasolares más excéntricos. Su periodo de revolución es de 380,85 días y su masa mínima equivale a 1,99 masas jovianas. Las variaciones de temperatura del planeta serían extremas de aproximadamente 150 K (similares a Júpiter) a aproximadamente 390 K.


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