HD 204313 b
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | HD 204313 | |
| Constellation | Capricornus | |
| Right ascension | (α) | 21h 28m 12.2063s |
| Declination | (δ) | –21° 43′ 34.517″ |
| Apparent magnitude | (mV) | 7.99 |
| Distance | 154.50 ± 4.53 ly (47.37 ± 1.39 pc) | |
| Spectral type | G5V | |
| Orbital elements | ||
| Semi-major axis | (a) | 3.082 ± 0.055 AU |
| Periastron | (q) | 2.678 AU |
| Apastron | (Q) | 3.486 AU |
| Eccentricity | (e) | 0.131 ± 0.023 |
| Orbital period | (P) | 1931 ± 18 d (5.29 ± 0.05 y) |
| Argument of periastron |
(ω) | -57 ± 11° |
| Time of periastron | (T0) | 3989 ± 62 JD |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 4.05 ± 0.17 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 106006 b | ||
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
HD 204313 b is an extrasolar planet which orbits the G-type main sequence star HD 204313, located approximately 155 light years away in the constellation Capricorn. This planet orbits the star at a distance of 3.082 astronomical units and takes 1931 days or 5.29 years to revolve around the star. It has minimum mass four times that of Jupiter. However the radius and inclination are not known since this planet was not detected by transit method or direct imaging. Instead, this planet was detected by radial velocity method using the CORALIE Echelle spectrograph mounted on the 1.2 meter Euler Swiss Telescope located at La Silla Observatory in Atacama desert, Chile 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: 
21h 28m 12.2063s, −21° 43′ 34.517″
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