Hellenica World

HD 20868

HD 20868 is an low-mass K type star in the southern constellation Fornax. It is a 10th magnitude star at a distance of about 151 light years from Earth.[1]


Planetary system

In October 2008 an extrasolar planet, HD 20868 b, was reported to be orbiting this star. This object was detected using the radial velocity method by search programs conducted using the HARPS spectrograph.[3]

The HD 20868 system[3]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity
HD 20868 b ≥1.99 ±0.05 MJ 0.947 ±0.012 380.85 ±0.09 0.75 ±0.002

See also

* List of extrasolar planets


References

1. ^ a b c d e f van Leeuwen, F. (2007). "HIP 15578". Hipparcos, the New Reduction. http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=15538. Retrieved 2010-02-06.
2. ^ a b c d e "SIMBAD query result: NLTT 10676 -- High proper-motion Star". Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=HD+20868. Retrieved 2009-06-10.
3. ^ a b Moutou et al.; Mayor, M.; Lo Curto, G.; Udry, S.; Bouchy, F.; Benz, W.; Lovis, C.; Naef, D. et al. (2009). "The HARPS search for southern extra-solar planets XVII. Six long-period giant planets around BD -17 0063, HD 20868, HD 73267, HD 131664, HD 145377, HD 153950" (abstract). Astronomy & Astrophysics 496 (2): 513–519. doi:10.1051/0004-6361:200810941. http://www.aanda.org/index.php?option=article&access=doi&doi=10.1051/0004-6361:200810941. (web Preprint)


External links

* "HD 20868". Exoplanets. http://media4.obspm.fr/exoplanets/base/etoile.php?nom=HD+20868.

Retrieved from "http://en.wikipedia.org/"
All text is available under the terms of the GNU Free Documentation License

Index

Scientificlib.com