HD 80606 b

Planetbox begin
name = HD 80606 bPlanetbox star
star = HD 80606
constell = Ursa Major
ra = RA|09|22|37.5679
dec = DEC|+50|36|13.397
dist_ly = 190
dist_pc = 58
class = G5VPlanetbox orbit
separation =
position_angle =
semimajor = 0.468 ± 0.027
semimajor_no_units =
eccentricity = 0.933 ± 0.001 [cite journal | author=WITTENMYER R., ENDL M., COCHRAN W. & LEVISON H. | year=2007 |title=Dynamical and Observational Constraints on Additional Planets in Highly Eccentric Planetary Systems | journal=Astronomical Journal | volume=134 | url=http://arxiv.org/abs/0706.1962v1 | page=1276]
period = 111.4487 ± 0.0032
period_year =
inclination =
ang_dist = 8
long_peri = 301
arg_peri =
t_peri = 2,453,199.0517 ± 0.0056
t_peri_no_jd =
t_transit =
t_transit_no_jd =
t_approach =
semi-amp = 481.9 ± 2.1Planetbox character
mass = >4.31 ± 0.35
mass_earth =
radius = ~1.039
radius_earth =
density =
gravity =
gravity_earth =
temperature = ~342Planetbox discovery
discovery_date = 4 April 2001
discoverers = Mayor "et al."
discovery_method = Radial velocity
discovery_site = flag|France
discovery_status = PublishedPlanetbox catalog
names = Struve 1341 Bb

HD 80606 b is an extrasolar planet approximately 190 light-years away in the constellation of Ursa Major. The planet was discovered orbiting the star HD 80606 in April 2001 by a team lead by Michel Mayor and Didier Queloz (whom discovered 51 Pegasi b). Based on its mass, at least 3 times that of Jupiter, it is likely to be a gas giant.

As of 2001, HD 80606 b has the most eccentric orbit of any extrasolar planet known. It has an eccentricity of 0.933, comparable to that of Comet Halley in our solar system. The eccentricity may be a result of the Kozai mechanism, which would occur if the planet's orbit is significantly inclined to that of the binary stars.

As a result of this high eccentricity, the planet's distance from its star varies from 0.03 to 0.84 AU. At apastron it would receive an insolation similar to that of Earth, while at periastron the insolation would be around 800 times greater, far more than that experienced by Mercury in our solar system. This would likely result in extreme seasonal variations.

References

*cite journal | url=http://www.edpsciences.org/papers/aa/full/2001/32/aade293/aade293.html?access=ok |author=Naef et al.|title=HD 80606 b, a planet on an extremely elongated orbit |journal = Astronomy and Astrophysics | volume=375 | year=2001 | pages=L27–L30|doi=10.1051/0004-6361:20010853
*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 ( [http://xxx.lanl.gov/abs/astro-ph/0607493 web Preprint] )

External links

*