Astronomy:HD 181720 b
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Short description: Extrasolar planet in the constellation Sagittarius
| Discovery | |
|---|---|
| Discovered by | Santos et al. |
| Discovery site | La Silla Observatory |
| Discovery date | October 19, 2009 |
| radial velocity (HARPS) | |
| Orbital characteristics | |
| astron|astron|helion}} | 2.24 AU (335,000,000 km) |
| astron|astron|helion}} | 1.31 AU (196,000,000 km) |
| 1.78 AU (266,000,000 km)[1] | |
| Eccentricity | 0.26 ± 0.06[1] |
| Orbital period | 956 ± 14[1] d 2.62 y |
| Average Orbital speed | 20.3 |
| astron|astron|helion}} | 2,453,631 ± 30[1] |
| 177 ± 12[1] | |
| Semi-amplitude | 8.4 ± 0.4[1] |
| Star | HD 181720 |
HD 181720 b is an extrasolar planet which orbits the G-type main sequence star HD 181720, located approximately 190 light years away in the constellation Sagittarius. This planet has at least three-eighths the mass of Jupiter and takes over two and five-eighths years to orbit the star at a semimajor axis of 1.78 AU with an eccentricity of 0.26.[1] This planet was detected by HARPS on October 19, 2009, together with 29 other planets.
The planet HD 181720 b is named Toge. The name was selected in the NameExoWorlds campaign by Ghana, during the 100th anniversary of the IAU. Toge means earring in the Ewe language.[2][3]
See also
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Santos, Nuno C.; Mayor, Michel; Benz, Willy; Bouchy, François et al. (2010). "The HARPS Search for Southern Extra-solar Planets XXI. Three New Giant Planets Orbiting the Metal-poor Stars HD 5388, HD 181720, and HD 190984". Astronomy and Astrophysics 512 (A47): A47. doi:10.1051/0004-6361/200913489. Bibcode: 2010A&A...512A..47S. http://www.aanda.org/articles/aa/full_html/2010/04/aa13489-09/aa13489-09.html.
- ↑ "Approved names" (in en). http://www.nameexoworlds.iau.org/final-results.
- ↑ "International Astronomical Union | IAU". https://www.iau.org/news/pressreleases/detail/iau1912/.
Coordinates: 
19h 22m 52.9859s, −32° 55′ 08.595″
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