HD 69830 c

HD 69830 c
Extrasolar planet List of extrasolar planets

HD 69830 and HD 69830 c
(Celestia image)
Parent star
Star HD 69830
Constellation Puppis
Right ascension (α) 08h 18m 23.947s[1]
Declination (δ) −12° 37′ 55.81″[1]
Apparent magnitude (mV) 5.95
Distance40.7 ± 0.2[1] ly
(12.49 ± 0.05[1] pc)
Spectral type K0V
Mass (m) 0.86 ± 0.03 M☉
Radius (r) 0.89 R☉
Temperature (T) 5385 ± 20 K
Metallicity [Fe/H] −0.05 ± 0.02
Age 5.1–6.1 Gyr
Orbital elements
Semimajor axis(a) 0.186 AU
Eccentricity (e) 0.13 ± 0.06
Orbital period(P) 31.56 ± 0.04 d
Argument of
periastron		 (ω) 221 ± 35°
Time of periastron (T0) 2,453,469.6 ± 2.8 JD
Semi-amplitude (K) 2.66 ± 0.16 m/s
Physical characteristics
Minimum mass(m sin i)0.038 MJ
Temperature (T) ~522
Discovery information
Discovery date May 18, 2006
Discoverer(s) Lovis et al.[2]
Discovery method Radial velocity
Discovery status Published[2]
Database references
Extrasolar Planets
Encyclopaedia		data
SIMBADdata
Exoplanet Archivedata
Open Exoplanet Cataloguedata

HD 69830 c is an exoplanet orbiting HD 69830. It is the second-closest planet in its system and likely to be a rocky planet, not a gas giant.[2] If it had formed as a gas giant, it would have stayed that way.[3]

References

  1. ↑ 1.0 1.1 1.2 1.3 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. ↑ 2.0 2.1 2.2 Lovis, Christophe et al. (2006). "An extrasolar planetary system with three Neptune-mass planets" (PDF). Nature 441 (7091): 305–309. arXiv:astro-ph/0703024. Bibcode:2006Natur.441..305L. doi:10.1038/nature04828. PMID 16710412.
  3. ↑ H. Lammer et al. (2007). "The impact of nonthermal loss processes on planet masses from Neptunes to Jupiters" (PDF). Geophysical Research Abstracts 9 (7850).

Coordinates: 08h 18m 23.9s, −12° 37′ 55.8″