HD 103197

HD 103197
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
Distance170 ± 10 ly
(53 ± 4 pc)
Absolute magnitude (MV)5.95
Details
Mass0.76 M☉
Radius0.88 ± 0.11 R☉
Luminosity0.434 ± 0.073 L☉
Surface gravity (log g)4.28 cgs
Temperature5020 ± 100 K
Metallicity [Fe/H]0.21 dex
Other designations
CD−49°6573, HIP 57931, PPM 769972
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia		data

HD 103197 is a 9th magnitude K-type main sequence star located approximately 170 light years away[1] 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.

The HD 103197 planetary system[2]
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) — —

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 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
  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″