HD 80606
4684666
224831441
2008-07-10T16:44:21Z
Kbdankbot
6505923
Robot - move category per [[WP:CFD|CFD]] [[Wikipedia:Categories for discussion/Log/2008 July 2|2008 July 2]]
{{Starbox short
| name = HD 80606
| epoch = [[J2000.0]]
| constell = [[Ursa Major]]
| ra = {{RA|09|22|37.5679}}
| dec = {{DEC|+50|36|13.397}}
| appmag_v = +8.93
| dist_ly = 190
| dist_pc = 58
| spectral = G5V
| names = Struve 1341 B, HIP 45982
| Simbad = HD+80606
}}
'''HD 80606''' is a [[yellow dwarf]] [[star]] approximately 190 [[light-year]]s away in the [[constellation]] of [[Ursa Major]]. The star is part of a [[binary star]] system with [[HD 80607]] (the [[Struve 1341]] system), which are both separated at an average distance of 1,200 [[astronomical unit]]s. [[As of 2001]], an [[extrasolar planet]] has been confirmed to orbit the star.
== Planetary system ==
[[As of 2001]], [[HD 80606 b]] has the most [[Eccentricity (orbit)|eccentric]] orbit of any extrasolar planet known. It has an eccentricity of 0.927, 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 [[Astronomical unit|AU]]. At [[apoapsis]] it would receive an [[insolation]] similar to that of [[Earth]], while at [[periapsis]] the insolation would be around 800 times greater, far more than that experienced by [[Mercury (planet)|Mercury]] in our solar system. This would likely result in extreme seasonal variations.
{{PlanetboxOrbit begin}}
{{PlanetboxOrbit
| exoplanet = [[HD 80606 b|b]]
| mass = >4.31±0.35
| semimajor = 0.468±0.027
| period = 111.4487±0.0032
| eccentricity = 0.9349±0.0023
}}
{{PlanetboxOrbit end}}
== See also ==
* [[HD 20782]]
* [[HD 80607]]
* [[Iota Horologii]]
== External links ==
* {{cite web |url=http://www.extrasolar.net/startour.asp?StarCatId=&StarId=140 |title=HD 80606 |accessdate=2008-06-25 |work=Extrasolar Visions}}
* {{cite web |url=http://exoplanet.eu/star.php?st=HD+80606 |title= Notes for star HD 80606 |accessdate=2008-06-25 |work=The Extrasolar Planets Encyclopaedia}}
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[[Category:Extrasolar planets]]
[[Category:HD and HDE objects|80606]]
[[Category:Ursa Major constellation]]
[[Category:G-type main sequence stars]]
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