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HD 52265 b is a gas giant exoplanet located approximately 98 light-years away[5] in the constellation of Monoceros, orbiting the star HD 52265. The planet has a minimum mass slightly more than that of Jupiter. Mean distance between the planet and the star is half that of Earth from the Sun. It was discovered by both the California and Carnegie Planet Search team and the Geneva Extrasolar Planet Search team independently of each other.[1][2][3] By studying the fluctuations of the brightness of a host star, the inclination of the stars equator was determined. This allowed to calculate its true mass, assuming that the planet orbits in the plane of the star's equator.[6]

HD 52265 b
Discovery[1][2][3]
Discovered byButler et al. and Naef et al.
Discovery siteKeck Observatory and La Silla Observatory
Discovery date2000
Detection method
Doppler spectroscopy
Orbital characteristics[4]
Semi-major axis
0.520±0.009 AU
Eccentricity0.27±0.02
Orbital period (sidereal)
119.27±0.02 d
Argument of perihelion
242±3 º
Semi-amplitude42.97±0.70 m/s
StarHD 52265
Physical characteristics[4]
Mass≥1.21±0.05 MJ

    The planet HD 52265 b is named Cayahuanca. The name was selected in the NameExoWorlds campaign by El Salvador, during the 100th anniversary of the IAU. Cayahuanca means "The rock looking at the stars" in the native Nahuat language.[7][8]


    References


    1. Butler, R. Paul; et al. (2000). "Planetary Companions to the Metal-rich Stars BD -10°3166 and HD 52265". The Astrophysical Journal. 545 (1): 504–511. Bibcode:2000ApJ...545..504B. doi:10.1086/317796.
    2. Naef, D.; et al. (2001). "The CORALIE survey for southern extrasolar planets V. 3 new extrasolar planets". Astronomy and Astrophysics. 375 (1): 205–218. arXiv:astro-ph/0106255. Bibcode:2001A&A...375..205N. doi:10.1051/0004-6361:20010841.
    3. "Exoplanets Galore!" (Press release). Garching, Germany: European Southern Observatory. April 15, 2000. Retrieved December 30, 2012.
    4. Wittenmyer, Robert A.; et al. (2019). "Truly eccentric – I. Revisiting eight single-eccentric planetary systems". Monthly Notices of the Royal Astronomical Society. 484 (4): 5859–5867. arXiv:1901.08471. Bibcode:2019MNRAS.484.5859W. doi:10.1093/mnras/stz290.
    5. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
    6. Wobbly, Sunlike Star Being Pulled by Giant Alien Planet, Charles Q. Choi
    7. "Approved names". NameExoworlds. Retrieved 2020-01-02.
    8. "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.



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