HD 147018 b
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | HD 147018 | |
| Constellation | Triangulum Australe | |
| Right ascension | (α) | 16h 23m 00.1463s |
| Declination | (δ) | −61° 41′ 19.542″ |
| Apparent magnitude | (mV) | 8.4 |
| Distance | 140.12 ± 5.2 ly (42.96 ± 1.6 pc) | |
| Spectral type | G9V | |
| Orbital elements | ||
| Semi-major axis | (a) | 0.2388 ± 0.0039 AU |
| Periastron | (q) | 0.1269 AU |
| Apastron | (Q) | 0.3507 AU |
| Eccentricity | (e) | 0.4686 ± 0.0081 |
| Orbital period | (P) | 44.236 ± 0.008 d (0.12111 ± 2e-5 y) |
| Argument of periastron |
(ω) | -24.03 ± 1.23° |
| Time of periastron | (T0) | 4459.49 ± 0.1 JD |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 2.12 ± 0.07 MJ |
| Discovery information | ||
| Discovery date | August 11, 2009 | |
| Discoverer(s) | Segransan et al. | |
| Discovery method | radial velocity (CORALIE) | |
| Discovery site | La Silla Observatory | |
| Discovery status | Published | |
| Other designations | ||
| HIP 80250 b | ||
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
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.
References
- 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.
Coordinates: 
16h 23m 00.1463s, −61° 41′ 19.542″
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