HD 69830 c

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HD 69830 c
Extrasolar planet List of extrasolar planets
HD 69830 and HD 69830 c.png
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
Distance 40.7 ± 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 K
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
SIMBAD data

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[edit]

  1. ^ a b c d 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. ^ a b c 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". Geophysical Research Abstracts 9 (7850). 

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