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HD 208487 b is an extrasolar planet located approximately 144 light-years away in the constellation of Grus, orbiting the star HD 208487. This planet has a minimum mass close to half that of Jupiter and is most probably a gas giant. The planet orbits the star in a close, eccentric orbit. One revolution takes 130 days to complete. This planet was discovered on September 16, 2004 by Tinney, Butler, and Marcy et al. using Doppler spectroscopy to measure the star's radial velocity changing over time as the planet revolves around its orbit.[1]

HD 208487 b
Discovery
Discovered byTinney, Butler,
Marcy et al.[1]
Discovery site United States
Discovery dateSeptember 16, 2004
Detection method
Doppler spectroscopy
Orbital characteristics
Semi-major axis
0.524 ± 0.030 AU (78,400,000 ± 4,500,000 km)[2]
Eccentricity0.24 ± 0.16[2]
Orbital period (sidereal)
130.08 ± 0.51[2] d
Time of periastron
2,450,999 ± 15[2]
Argument of periastron
113[2]
Semi-amplitude19.7 ± 3.6[2]
StarHD 208487

    The planet HD 208487 b is named Mintome. The name was selected in the NameExoWorlds campaign by Gabon, during the 100th anniversary of the IAU. Mintome, in the Fang tongue, is a mythical land where a brotherhood of brave men live.[3][4]


    References


    1. Tinney, C. G.; et al. (2005). "Three Low-Mass Planets from the Anglo-Australian Planet Search". The Astrophysical Journal. 623 (2): 1171–1179. Bibcode:2005ApJ...623.1171T. CiteSeerX 10.1.1.491.2941. doi:10.1086/428661.
    2. Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701.
    3. "Approved names". NameExoworlds. Retrieved 2020-01-02.
    4. "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.



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    На других языках

    [de] HD 208487 b

    HD 208487 b ist ein Exoplanet, der den gelben Zwerg HD 208487 umkreist. Auf Grund seiner Masse wird angenommen, dass es sich um einen Gasplaneten handelt.
    - [en] HD 208487 b

    [es] HD 208487 b

    HD 208487 b es un planeta extrasolar situado aproximadamente a 144 años luz en la constelación de la Grus, orbitando la estrella HD 208487. Este planeta tiene una masa mínima cerca de a la mitad de la de Júpiter y lo más probable es que sea un gigante gaseoso. El planeta orbita la estrella en una pequeña órbita excéntrica. Su periodo orbital es de 130 días. Este planeta fue descubierto el 16 de septiembre de 2004 por Tinney, Butler y Marcy et al. utilizando la técnica de la espectroscopia Doppler para medir los cambios de la velocidad radial de la estrella debidas al planeta.[2]


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