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HD 212771 b is an extrasolar planet orbiting the G-type star HD 212771 approximately 364 light years away[3] in the constellation Aquarius.[1]

"Victoriapeak" redirects here. Not to be confused with Victoria Peak.
HD 212771 b
Discovery[1]
Discovered byJohnson et al.
Discovery siteKeck Observatory
Discovery date2010-03-17
Detection method
Doppler spectroscopy
Orbital characteristics[2]
Semi-major axis
1.19±0.13 AU
Eccentricity0.076±0.051
Orbital period (sidereal)
380.7±1.4 d
Time of perihelion
2454920±52 JD
Argument of perihelion
29±65 º
Semi-amplitude50.0±5.8 m/s
StarHD 212771
Physical characteristics[2]
Mass≥2.39±0.27 MJ

    Nomenclature


    HD 212771 b is named Victoriapeak. The name was selected in the NameExoWorlds campaign by Hong Kong, during the 100th anniversary of the IAU. It is named after the Victoria Peak. The host star HD 212771 is named Lionrock, after the Lion Rock.[4][5]


    Properties



    Orbit


    HD 212771 b's orbit period and distance are similar to Earth's, with the values being 380 days and 1.19 AU respectively. It orbits in a nearly perfect circular orbit compared to long period gas giants.


    Characteristics


    Size comparison
    Jupiter HD 212771 b

    Due to the unknown orbital parameters, the planets true mass is not known, with a minimum of 2.39 times Jupiter's mass. HD 212771 b's radius is unknown, so NASA's Eyes on Exoplanets gives an estimate of 1.18 times the radius.[6]


    See also



    References


    1. Johnson, John Asher; et al. (2010). "Retired a Stars and Their Companions. IV. Seven Jovian Exoplanets from Keck Observatory". Publications of the Astronomical Society of the Pacific. 122 (892): 701–711. arXiv:1003.3445. Bibcode:2010PASP..122..701J. doi:10.1086/653809.
    2. Luhn, Jacob K.; et al. (2019). "Retired A Stars and Their Companions. VIII. 15 New Planetary Signals around Subgiants and Transit Parameters for California Planet Search Planets with Subgiant Hosts". The Astronomical Journal. 157 (4). 149. arXiv:1811.03043. Bibcode:2019AJ....157..149L. doi:10.3847/1538-3881/aaf5d0.
    3. Brown, A. G. A.; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics. 595. A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512.Gaia Data Release 1 catalog entry
    4. "Approved names". NameExoworlds. Retrieved 2020-01-02.
    5. "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
    6. "Eyes On Exoplanets – Exoplanet Exploration: Planets Beyond our Solar System". exoplanets.nasa.gov. Retrieved 2021-06-06.




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    На других языках

    - [en] HD 212771 b

    [ru] HD 212771 b

    HD 212771 b — экзопланета, вращающаяся вокруг жёлтого карлика HD 212771 и находящаяся на расстоянии приблизительно 427 световых лет в созвездии Водолея[2].


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