Hellenica World

HD 23127

HD 23127 is a star in the Reticulum constellation. At the distance of 320 ly,[1] it is not visible to the naked eye, but it is visible with a good pair of binoculars.


Star

HD 23127 is a hydrogen-fusing sun-like star with spectrum G2V. The star is more massive than our Sun at 1.13 solar mass. The star is also more metal-rich, meaning it contains two times more metals [Fe/H] than our Sun. It is older than the local star at 7 billion years, more than half-way through its life.

Planetary system

On Friday, February 9, 2007, a 1214 day period jovian planet was found by using the wobble method by O’Toole in Australia. It has minimum mass 37% greater than Jupiter and orbits in 44% eccentricity. The distance from the star ranges from 1.28 to 3.30 astronomical units with the average distance 2.29 AU.[2]

The HD 23127 system[2]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity
b >1.5 ± 0.2 MJ 2.4 ± 0.3 1214 ± 9 0.44 ± 0.07

See also

* List of extrasolar planets


References

1. ^ a b c d e f van Leeuwen, F. (2007). "HIP 17054". Hipparcos, the New Reduction. http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=17012. Retrieved 2010-02-06.
2. ^ a b O'Toole et al.; Butler, R. Paul; Tinney, C. G.; Jones, Hugh R. A.; Marcy, Geoffrey W.; Carter, Brad; McCarthy, Chris; Bailey, Jeremy et al. (2007). "New Planets around Three G Dwarfs". The Astrophysical Journal 660 (2): 1636–1641. doi:10.1086/513563. http://www.iop.org/EJ/article/0004-637X/660/2/1636/70956.html.


External links

* "HD 23127". The Extrasolar Planets Encyclopedia. http://exoplanet.eu/star.php?st=HD+23127.

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