HD 103197 b

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
Distance170 ± 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
SIMBADdata
Exoplanet Archivedata
Open Exoplanet Cataloguedata

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. 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
  2. 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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