HD 75289 b

Infobox Planet
bgcolour = #A0B0FF
name = HD 75289 b
discovery = yes
discovered = February 1, 1999
discovery_method = Radial velocity
discovery_site = California, USA
discoverer = Udry et al.
semimajor = 0.0482 ± 0.0028 AU
eccentricity = 0.034 ± 0.029
period = 3.509267 ± 0.000064 d
angular_dist = 2 mas
long_periastron = 141°
time_periastron = 2,450,830.34 ± 0.48 JD
semi-amplitude = 54.9 ± 1.8 m/s
physical_characteristics = yes
mass = >0.467 ± 0.041 "M"_J

HD 75289 b is an extrasolar planet orbiting the star HD 75289 in Vela constellation. It has a minimum mass half that of Jupiter, and it orbits in a very short orbit completing one circular revolution around the star in three and a half days. By studying the starlight scientists have concluded that the planet must have an albedo less than 0.12, rather low for a gas giant. Otherwise its reflected light would have been detected.

This planet was discovered on February 1, 1999 in California, USA by Stephane Udry who used the wobble method (radial velocity method).

References

*cite journal | url=http://aa.springer.de/papers/0356002/2300590/small.htm |author=Udry et al.|title=The CORALIE survey for southern extra-solar planets II. The short-period planetary companions to HD 75289 and HD 130322 |journal = Astronomy and Astrophysics | volume=356 | year=2000 | pages=590–598
*cite journal | url=http://www.journals.uchicago.edu/doi/abs/10.1086/504701 | author=Butler "et al." | title=Catalog of Nearby Exoplanets | journal=The Astrophysical Journal | volume=646 | issue=1 | pages=505 – 522 | year=2006 | doi=10.1086/504701 | format=abstract ( [http://xxx.lanl.gov/abs/astro-ph/0607493 web Preprint] )

External links

* [http://exoplanet.eu/ The Extrasolar Planets Encyclopaedia] [http://exoplanet.eu/planet.php?p1=HD 75289&p2=b entry]
* [http://www.extrasolar.net Extrasolar Visions] [http://www.extrasolar.net/planettour.asp?StarCatId=normal&PlanetId=47 entry]