HD 169830

HD 169830 is a yellow-white dwarf star (spectral type F9V) in the constellation of Sagittarius, 118.46 light years from our solar system. It is known to be orbited by two large Jupiter-like planets.

Star

This star is classified as spectral type F7V, meaning the color of the photosphere of this star is yellow-white. It takes 9.5 days for the star to rotate once around its axis. This star is 40% more massive and 84% larger than our Sun. Combining the mass and radius makes the surface gravity only 41% that of our Sun.

Planetary system

On May 4, 2000, the Geneva Extrasolar Planet Search Team announced the discovery of a 3 MJ planet in a 226 day orbit.[2] Three years later on June 30, 2003, the same two teams using the same method discovered a 3.5 MJ second planet orbiting about halfway between the distances of Mars and Jupiter (or in the middle of the asteroid belt) in the solar system from the star.

See also

* HD 69830
* List of extrasolar planets

References

1. ^ a b c d e van Leeuwen, F. (2007). "HIP 90485". Hipparcos, the New Reduction. http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=90186. Retrieved 2009-12-12.
2. ^ "Exoplanets Galore!". European Southern Observatory. 4 May 2000. http://www.eso.org/public/outreach/press-rel/pr-2000/pr-13-00.html. Retrieved 8 August 2009.
3. ^ Mayor et al.; Udry, S.; Naef, D.; Pepe, F.; Queloz, D.; Santos, N. C.; Burnet, M. (2004). "The CORALIE survey for southern extra-solar planets XII. Orbital solutions for 16 extra-solar planets discovered with CORALIE". Astronomy and Astrophysics 415: 391–402. doi:10.1051/0004-6361:20034250. http://www.aanda.org/articles/aa/full/2004/07/aa0250/aa0250.html.

* Raghavan et al.; Henry, Todd J.; Mason, Brian D.; Subasavage, John P.; Jao, Wei‐Chun; Beaulieu, Thom D.; Hambly, Nigel C. (2006). "Two Suns in The Sky: Stellar Multiplicity in Exoplanet Systems". The Astrophysical Journal 646 (1): 523–542. doi:10.1086/504823. http://www.iop.org/EJ/article/0004-637X/646/1/523/64035.html.
* Naef et al.; Mayor, M.; Pepe, F.; Queloz, D.; Santos, N. C.; Udry, S.; Burnet, M. (2001). "The CORALIE survey for southern extrasolar planets V. 3 new extrasolar planets". Astronomy and Astrophysics 375 (1): 205–218. doi:10.1051/0004-6361:20010841. http://www.aanda.org/articles/aa/full/2001/31/aa10239/aa10239.html.

External links

* "Notes for star HD 169830". The Extrasolar Planets Encyclopaedia. http://exoplanet.eu/star.php?st=HD+169830. Retrieved 2006-04-14.
* John Whatmough. "HD 169830". Extrasolar Visions. http://www.extrasolar.net/startour.asp?StarCatId=&StarId=114. Retrieved 2006-04-14.
* Extrasolar Planet Interactions by Rory Barnes & Richard Greenberg, Lunar and Planetary Lab, University of Arizona