Hellenica World

HD 2638

HD 2638 is a dim 10th magnitude star in the constellation of Cetus. It is a yellow dwarf and similar to our Sun. A small telescope is required to view the star.

Planetary system

In 2005 the discovery of an extrasolar planet HD 2638 b orbiting the star was announced by the Geneva Extrasolar Planet Search Team.[2]

The HD 2638 system[2]
(in order from star)
Mass Semimajor axis
Orbital period
b >0.48 MJ 0.044 3.4442 ± 0.0002 0

See also

* List of extrasolar planets


1. ^ a b c d e van Leeuwen, F. (2007). "HIP 2350". Hipparcos, the New Reduction. http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=2344. Retrieved 2009-12-04.
2. ^ a b Moutou et al.; Mayor, M.; Bouchy, F.; Lovis, C.; Pepe, F.; Queloz, D.; Santos, N. C.; Udry, S. et al. (2005). "The HARPS search for southern extra-solar planets IV. Three close-in planets around HD 2638, HD 27894 and HD 63454". Astronomy and Astrophysics 439 (1): 367–373. doi:10.1051/0004-6361:20052826. http://www.aanda.org/articles/aa/full/2005/31/aa2826-05/aa2826-05.html.

External links

* SIMBAD: HD 2638
* The Extrasolar Planets Encyclopaedia entry
* Extrasolar Visions: HD 2638

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