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}} {{-}} {{star-stub}} [[Category:Extrasolar planets]] [[Category:HD and HDE objects|80606]] [[Category:Ursa Major constellation]] [[Category:G-type main sequence stars]] [[de:HD 80606]] [[sk:HD 80606]] [[sv:HD 80606]]