HD 147018 b is a gas giant extrasolar planet which orbits the G-type main sequence star HD 147018, located approximately 140 light years away in the constellation Triangulum Australe. This planet has minimum mass more than twice that of Jupiter but this planet orbits a lot closer to the star than Jupiter to the Sun by a factor of 22. Meanwhile, it has an eccentric orbit. The planet can get as close to the star as 0.13 AU or can get as far as 0.35 AU. Further out, there is another superjovian planet HD 147018 c, which was discovered on the same date as this planet, on August 11, 2009.
| Discovery | |
|---|---|
| Discovered by | Segransan et al. |
| Discovery site | La Silla Observatory |
| Discovery date | August 11, 2009 |
| radial velocity (CORALIE) | |
| Orbital characteristics | |
| Apastron | 0.3507 AU (52,460,000 km) |
| Periastron | 0.1269 AU (18,980,000 km) |
| 0.2388 ± 0.0039 AU (35,720,000 ± 580,000 km) | |
| Eccentricity | 0.4686 ± 0.0081 |
| 44.236 ± 0.008 d 0.12111 ± 2e-5 y | |
| 4459.49 ± 0.1 | |
| -24.03 ± 1.23 | |
| Star | HD 147018 |
References
edit- Segransan; et al. (February 2010). "The CORALIE survey for southern extrasolar planets. XVI. Discovery of a planetary system around HD 147018 and of two long period and massive planets orbiting HD 171238 and HD 204313". Astronomy & Astrophysics. 511. article A45. arXiv:0908.1479. Bibcode:2010A&A...511A..45S. doi:10.1051/0004-6361/200912136. S2CID 8864844.
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