HD 28254 b
HD 28254 b (also known as HIP 20606 b) is an extrasolar planet which orbits the G-type main sequence star HD 28254, located approximately 178 light years away in the constellation Dorado.
| Discovery[1] | |
|---|---|
| Discovered by | Naef et al. |
| Discovery site | La Silla Observatory |
| Discovery date | October 19, 2009 |
| radial velocity (HARPS) | |
| Orbital characteristics[1] | |
| 2.15 AU (322,000,000 km) | |
| Eccentricity | 0.81+0.05 −0.02 |
| 1,116±26 d | |
| 2,454,049+43 −55 JD | |
| 301°+3° −4° | |
| Semi-amplitude | 37.3+5.1 −0.9 m/s |
| Star | HD 28254 |
| Physical characteristics | |
Mean radius | 1.21 RJ |
| Mass | 1.16+0.10 −0.06 MJ[1] |
| 34.93 m/s2 | |
| Temperature | 207+13 −40 K |
Discovery
The planet was discovered in a survey by HARPS along with 29 other planets in 2009.[1]
Properties
Due to the planets high mass, it's assumed to be a gas giant like Jupiter. Since HD 28254 was detected indirectly, properties such as its inclination, radius, and temperature are unknown. HD 28254 takes about 3 years to orbit its host. However, the planet has one of the most eccentric orbits around a star.
References
- 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.
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