HD 103197 b
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | HD 103197 | |
| Constellation | Centaurus | |
| Right ascension | (α) | 11h 52m 52.979s[1] |
| Declination | (δ) | –50° 17′ 34.17″[1] |
| Apparent magnitude | (mV) | 9.41 |
| Distance | 170 ± 10[1] ly (53 ± 4[1] pc) | |
| Spectral type | K1Vp | |
| Orbital elements | ||
| Semi-major axis | (a) | 0.235 AU (35.2 Gm) |
| 4.77 mas | ||
| Eccentricity | (e) | 0 (fixed) |
| Orbital period | (P) | 47.8 d (0.131 y) |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 0.1 MJ |
| Discovery information | ||
| Discovery date | October 19, 2009 | |
| Discoverer(s) | Mordasini et al.[2] | |
| Discovery method | radial velocity (HARPS) | |
| Discovery site | La Silla Observatory | |
| Discovery status | Published[2] | |
| Other designations | ||
| HIP 57931 b | ||
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
HD 103197 b (also known as HIP 57931 b) is an extrasolar planet which orbits the K-type main sequence star HD 103197, located approximately 170 light years away[1] in the constellation Centaurus. This planet has at least one-tenth the mass of Jupiter and takes 48 days to orbit the star at a semimajor axis of 0.235 AU. Fitting the observational data with a Keplerian orbit leads to a solution with an insignificant eccentricity. This planet was announced by the Swiss-led HARPS team on October 19, 2009, together with 29 other planets.
References
- 1 2 3 4 5 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.Vizier catalog entry
- 1 2 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.
Coordinates: 
11h 52m 52.9787s, −50° 17′ 34.160″
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