astro.wikisort.org - Meteorite
HD 43197 b is an extrasolar planet which orbits the G-type main sequence or subgiant star HD 43197, located approximately 204 light years away in the constellation Canis Major. This planet has a minimum mass 55% that of Jupiter and takes 0.85 years to orbit the star at a semimajor axis of 0.882 AU.[2] Its has a high eccentricity of 0.74, but its inclination is not known. This planet was detected by HARPS on October 19, 2009, together with 29 other planets.
| Discovery | |
|---|---|
| Discovered by | Naef et al. |
| Discovery site | La Silla Observatory |
| Discovery date | October 19, 2009 |
Detection method | radial velocity (HARPS) |
| Orbital characteristics[1] | |
Semi-major axis | 0.882+0.035 −0.039 AU |
| Eccentricity | 0.742+0.017 −0.018 |
Orbital period (sidereal) | 308.9+2.3 −2.8 d |
Time of periastron | 2452535.102+17.503 −14.898 |
Argument of periastron | 268.525°+3.824° −4.523° |
| Semi-amplitude | 25.439+1.472 −1.121 m/s |
| Star | HD 43197 |
| Physical characteristics[1] | |
| Mass | ≥0.553+0.052 −0.048 |
In 2022, a second super-Jovian planet was discovered orbiting HD 43197 using a combination of radial velocity and astrometry. Assuming HD 43197 b shares the outer planet's orbital inclination, its true mass would be about 4 MJ.[1]
The planet HD 43197 b is named Equiano. The name was selected in the NameExoWorlds campaign by Nigeria, during the 100th anniversary of the IAU. Olaudah Equiano was a writer and abolitionist from Ihiala, Nigeria who fought injustice and for the elimination of the slave trade.[3][4]
References
- Feng, Fabo; Butler, R. Paul; et al. (August 2022). "3D Selection of 167 Substellar Companions to Nearby Stars". The Astrophysical Journal Supplement Series. 262 (21). arXiv:2208.12720. Bibcode:2022ApJS..262...21F. doi:10.3847/1538-4365/ac7e57.
- Naef, Dominique; Mayor, Michel; Lo Curto, Gaspare; Bouchy, François; Lovis, Christophe; Moutou, Claire; Benz, Willy; Pepe, Francesco; Queloz, Didier; Santos, Nuno C.; Ségransan, Damien; Udry, Stéphane; Bonfils, Xavier; Delfosse, Xavier; Forveille, Thierry; Hébrard, Guillaume; Mordasini, Christoph; Perrier, Christian; Boisse, Isabelle; Sosnowska, Danuta (2010). "The HARPS Search for Southern Extrasolar Planets XXIII. 8 Planetary Companions to Low-activity Solar-type Stars". Astronomy and Astrophysics. 523: A15. arXiv:1008.4600. Bibcode:2010A&A...523A..15N. doi:10.1051/0004-6361/200913616. S2CID 118845989.
- "Approved names". NameExoworlds. Retrieved 2020-01-02.
- "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
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На других языках
- [en] HD 43197 b
[es] HD 43197 b
HD 43197 b (también conocido HIP 29550 b) es un planeta extrasolar que orbita la estrella de tipo G HD 43197, una subgigante de la secuencia principal. Se encuentra a aproximadamente 179 años luz en la constelación de Canis Maior. Este planeta tiene por lo menos tres quintas partes de la masa de Júpiter y su periodo orbital es de 0,9 años, con un semieje mayor de 0,0868 UA. Sin embargo, a diferencia de la mayoría de los exoplanetas conocidos, su excentricidad se desconoce, pero es habitual que se desconozca su inclinación. Este planeta fue detectado por HARPS el 19 de octubre de 2009, junto con otros 29 planetas. El astrónomo Wladimir Lyra (2009) ha propuesto Arctophonus como posible nombre para HD 43197 b.[1]Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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