HD 103197
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 11h 52m 52.9787s |
| Declination | –50° 17′ 34.160″ |
| 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 ( | RA: –80.50 mas/yr Dec.: 7.36 mas/yr |
| Parallax ( | 20.27 ± 1.47 mas |
| Distance | 160 ± 10 ly (49 ± 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 | 0.21 |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 103197 is a 9th magnitude K-type main sequence star located approximately 161 light years away in the constellation Centaurus. This star is smaller, cooler, dimmer, and less massive than our Sun. Also 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 ( |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥31.2 ± 2.0 M🜨 | 0.249 ± 0.004 | 47.84 ± 0.03 | 0.0(fixed) | — | — |
See also
References
- ^ 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.
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