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HD 33564

HD 33564 is a 5th magnitude star located approximately 48 light-years away[1] in the constellation of Camelopardalis. It is an F-type main sequence, indicating that the star is hotter and more massive than our Sun. The age of the star is only 3 Ga; despite of this, the star is only 76% the solar abundance of iron. HD 33564 is a naked eye planetary host star.

Planetary system

In September 2005, a massive planet was found orbiting the star surrounded by a disk. However, by next month, the disk was disproved because the infrared radiation is actually coming from the background galaxy passing very close to its star in apparent distance.[2]

The HD 33564 system[2]
(in order from star)
Mass Semimajor axis
Orbital period
b >9.1 MJ 1.1 388 ± 3 0.34 ± 0.02

See also

* List of extrasolar planets


1. ^ a b c d e f van Leeuwen, F. (2007). "HIP 25110". Hipparcos, the New Reduction. http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=25045. Retrieved 2010-02-27.
2. ^ a b Galland et al.; Lagrange, A.-M.; Udry, S.; Chelli, A.; Pepe, F.; Beuzit, J.-L.; Mayor, M. (2005). "Extrasolar planets and brown dwarfs around A-F type stars II. A planet found with ELODIE around the F6V star HD 33564". Astronomy and Astrophysics 444 (2): L21–L24. doi:10.1051/0004-6361:200500176. http://www.aanda.org/articles/aa/full/2005/47/aahf031/aahf031.html.

External links

* "Notes for star HD 33564". The Extrasolar Planets Encyclopaedia. http://exoplanet.eu/star.php?st=HD+33564. Retrieved 2008-08-20.
* HR%201686 HR 1686
* obswww.unige.ch
* CCDM J05227+7913
* Image HD 33564

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