HD 103197
HD 103197 is a 9th magnitude K-type main sequence star located approximately 170 light years away[1] in the constellation Centaurus. The star is smaller, cooler, dimmer, and less massive than our Sun. Its metal content is thirteen-eighths as much as the Sun. In 2009, a gas giant planet was found in orbit around the star.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥31.2 ± 2.0 M⊕ | 0.249 ± 0.004 | 47.84 ± 0.03 | 0.0(fixed) | — | — |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 11h 52m 52.979s[1] |
| Declination | –50° 17′ 34.17″[1] |
| Apparent magnitude (V) | 9.41 |
| Characteristics | |
| Spectral type | K1Vp |
| Apparent magnitude (B) | 10.26 |
| Apparent magnitude (J) | 7.916 |
| Apparent magnitude (H) | 7.600 |
| Apparent magnitude (K) | 7.426 |
| B−V color index | 0.85 |
| Astrometry | |
| Proper motion (μ) | RA: –80.24 ± 0.91[1] mas/yr Dec.: 6.61 ± 0.99[1] mas/yr |
| Parallax (π) | 18.82 ± 1.41[1] mas |
| Distance | 170 ± 10 ly (53 ± 4 pc) |
| Absolute magnitude (MV) | 5.95 |
| Details | |
| Mass | 0.76 M☉ |
| Radius | 0.88 ± 0.11 R☉ |
| Luminosity | 0.434 ± 0.073 L☉ |
| Surface gravity (log g) | 4.28 cgs |
| Temperature | 5020 ± 100 K |
| Metallicity [Fe/H] | 0.21 dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
See also
- List of extrasolar planets
References
- van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.Vizier catalog entry
- Mordasini, C.; et al. (2011). "The HARPS search for southern extrasolar planets XXIV. Companions to HD 85390, HD 90156, and HD 103197: a Neptune analog and two intermediate-mass planets". Astronomy and Astrophysics. 526. A111. arXiv:1010.0856. Bibcode:2011A&A...526A.111M. doi:10.1051/0004-6361/200913521. S2CID 59062607.
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