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HD 213240

HD 213240 is a yellow main sequence star located approximately 133 light years (41 parsecs) away in the constellation Grus. The magnitudes were m=6.80 and M=3.75. It is a metal-rich star and more evolved than our sun. A red dwarf companion star was detected in 2005 with a projected separation of 3898 AU.


Planetary system

The Geneva extrasolar planet search team discovered a planet orbiting this star in 2001.[1]

The HD 213240 system[2]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity
b >4.72 ± 0.40 MJ 1.92 ± 0.11 882.7 ± 7.6 0.421 ± 0.015

See also

* HD 212301
* List of extrasolar planets


References

1. ^ Santos et al.; Mayor, M.; Naef, D.; Pepe, F.; Queloz, D.; Udry, S.; Burnet, M. (2001). "The CORALIE survey for southern extra-solar planets VI. New long period giant planets around HD 28185 and HD 213240". Astronomy and Astrophysics 379 (3): 999–1004. doi:10.1051/0004-6361:20011366. http://www.aanda.org/articles/aa/full/2001/45/aah3054/aah3054.html.
2. ^ Butler et al.; Wright, J. T.; Marcy, G. W.; Fischer, D. A.; Vogt, S. S.; Tinney, C. G.; Jones, H. R. A.; Carter, B. D. et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646 (1): 505–522. doi:10.1086/504701. http://www.iop.org/EJ/article/0004-637X/646/1/505/64046.html.

* Mugrauer et al.; Neuhäuser, R.; Seifahrt, A.; Mazeh, T.; Guenther, E. (2005). "Four new wide binaries among exoplanet host stars". Astronomy and Astrophysics 440 (3): 1051–1060. doi:10.1051/0004-6361:20042297. http://www.aanda.org/articles/aa/full/2005/36/aa2297-04/aa2297-04.html.


External links

* "Notes for star HD 213240". The Extrasolar Planets Encyclopaedia. http://exoplanet.eu/star.php?st=HD+213240. Retrieved 2008-08-29.
* "HD 213240". Extrasolar Visions. http://www.extrasolar.net/planettour.asp?StarCatId=normal&StarId=133. Retrieved 2008-08-29.

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