Astronomy:HD 187123 c

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Short description: Eccentric Jovian planet orbiting HD 187123
HD 187123 c
Discovery
Discovered byWright et al.
Discovery siteCalifornia , USA
Discovery dateNovember 2006
radial velocity
Orbital characteristics
4.417±0.054 AU
Eccentricity0.280±0.022[1]
Orbital period3324±46[1] d
astron|astron|helion}}2453625±40[1]
258.5±3.9[1]
Semi-amplitude25.10±0.44[1]
StarHD 187123


HD 187123 c is an extrasolar planet located approximately 156 light-years away in the constellation of Cygnus, orbiting the star HD 187123. This planet was published in 2006. The radius of the planet's orbit is 4.80 AU, 113 times more distant from the star than first companion. This takes 10 years to orbit. As it is typical for very long-period planets, the orbit is eccentric, referring to as "eccentric Jupiter". At periastron, the orbital distance is 3.60 AU and at apastron, the distance is 6.00 AU. The planet's mass is nearly 2 times that of Jupiter, but is likely to be smaller in size than the inner planet.[2][3]

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Feng, Y. Katherina et al. (2015). "The California Planet Survey IV: A Planet Orbiting the Giant Star HD 145934 and Updates to Seven Systems with Long-period Planets". The Astrophysical Journal 800 (1): 22. doi:10.1088/0004-637X/800/1/22. Bibcode: 2015ApJ...800...22F. 
  2. ↑ Wright, J. T. et al. (2007). "Four New Exoplanets and Hints of Additional Substellar Companions to Exoplanet Host Stars". The Astrophysical Journal 657 (1): 533–545. doi:10.1086/510553. Bibcode: 2007ApJ...657..533W. 
  3. ↑ Wright, J. T. et al. (2009). "Ten New and Updated Multi-planet Systems, and a Survey of Exoplanetary Systems". The Astrophysical Journal 693 (2): 1084–1099. doi:10.1088/0004-637X/693/2/1084. Bibcode: 2009ApJ...693.1084W. 

External links

Coordinates: Sky map 19h 46m 58.1130s, +34° 25′ 10.288″




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