HD 204313
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Capricornus |
| Right ascension | 21h 28m 12.207s[1] |
| Declination | –21° 43′ 34.52″[1] |
| Apparent magnitude (V) | 7.99 |
| Characteristics | |
| Spectral type | G5V |
| Apparent magnitude (B) | 8.70 |
| Apparent magnitude (J) | 6.812 |
| Apparent magnitude (H) | 6.539 |
| Apparent magnitude (K) | 6.459 |
| B−V color index | 0.71 |
| Astrometry | |
| Radial velocity (Rv) | –10.1 km/s |
| Proper motion (μ) | RA: 42.86 ± 0.61[1] mas/yr Dec.: -271.51 ± 0.36[1] mas/yr |
| Parallax (π) | 21.11 ± 0.62[1] mas |
| Distance | 155 ± 5 ly (47 ± 1 pc) |
| Absolute magnitude (MV) | 4.62 |
| Details | |
| Mass | 1.045 ± 0.033 M☉ |
| Temperature | 5767 ± 17 K |
| Metallicity | 0.18 ± 0.02 |
| Age | 3.38 ± 2.58 years |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
HD 204313 is an 8th magnitude G-type main sequence star located approximately 155 light years away in the constellation Capricornus.
Planet system
- In August 2009, this sun-like star is found to have a gas giant planet similar in size to Jupiter in orbit around it.[2]
- In 2nd 2012, the second and third planet was found. An Ice Giant like Neptune close to the star and another Jupiter sized planet far from its star.[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| c | 0.054 (± 0.0054) MJ | 0.2103 (± 0.0035) | 34.873 (± 0.0388) | 0.17 (± 0.09) | — | — |
| b | 3.55 (± 0.2) MJ | 3.04 (± 0.06) | 1920.1 (± 25) | 0.23 (± 0.04) | — | — |
| d | 1.68 (± 0.3) MJ | 3.93 (± 0.14) | 2831.6 (± 150) | 0.28 (± 0.09) | — | — |
See also
References
- 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. Bibcode:2007A&A...474..653V. arXiv:0708.1752
. doi:10.1051/0004-6361:20078357. Vizier catalog entry - 1 2 Ségransan; et al. (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 and Astrophysics. 511. Bibcode:2010A&A...511A..45S. arXiv:0908.1479 . doi:10.1051/0004-6361/200912136.
- 1 2 Robertson; et al. (2012). "A Second Giant Planet in 3:2 Mean-motion Resonance in the HD 204313 System". The Astrophysical Journal. 754 (1). Bibcode:2012ApJ...754...50R. arXiv:1205.3689 . doi:10.1088/0004-637X/754/1/50.
Coordinates: 
21h 28m 12.2063s, −21° 43′ 34.517″
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