HD 181720 b
Appearance
Discovery | |
---|---|
Discovered by | Santos et al. |
Discovery site | La Silla Observatory |
Discovery date | October 19, 2009 |
radial velocity (HARPS) | |
Orbital characteristics | |
Apastron | 2.24 |
Periastron | 1.31 |
1.78 | |
Eccentricity | 0.26 ± 0.06[1] |
956 ± 14[1] d 2.62 y | |
Average orbital speed | 20.3 |
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
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
[edit]References
[edit]- ^ a b c d e f g 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. arXiv:0912.3216. Bibcode:2010A&A...512A..47S. doi:10.1051/0004-6361/200913489. S2CID 118675798.
- ^ "Approved names". NameExoworlds. Retrieved 2020-01-02.
- ^ "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.