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HD 188015

HD 188015 is an 8th magnitude star about 172 light-years away in the constellation of Vulpecula. It is a yellow subgiant, a Sun-like star that has ceased or is about to stop hydrogen fusion in its core. However, it is only slightly brighter than the Sun, but probably much older.

The star is almost twice as metal-rich as the Sun. Planets are common around such stars, and this star also has one known planet orbiting it.

The HD 188015 system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity
b >1.50 ± 0.13 MJ 1.203 ± 0.070 461.2 ± 1.7 0.137 ± 0.026
c (unconfirmed) >0.07 MJ 0.08 8.386 0.23

See also

* HD 187085
* List of extrasolar planets


References

* Marcy et al.; Butler, R. Paul; Vogt, Steven S.; Fischer, Debra A.; Henry, Gregory W.; Laughlin, Greg; Wright, Jason T.; Johnson, John A. (2005). "Five New Extrasolar Planets". The Astrophysical Journal 619: 570–584. doi:10.1086/426384. http://www.iop.org/EJ/article/0004-637X/619/1/570/60844.html.


External links

* "Notes for star HD 188015". The Extrasolar Planets Encyclopaedia. http://exoplanet.eu/star.php?st=HD+188015.
* "HD 188015". Extrasolar Visions. http://www.extrasolar.net/planettour.asp?StarCatId=normal&StarId=241.

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