Physical properties HD 80606 b

orbital motion of hd 80606 b.

hd 80606 b has eccentric orbit of known planet after hd 20782 b. eccentricity 0.9336, comparable halley s comet. eccentricity may result of kozai mechanism, occur if planet s orbit inclined of binary stars. interpretation supported measurements of rossiter–mclaughlin effect, indicate planet s orbit may inclined (by approximately 50 degrees) rotational axis of star, configuration expected if kozai mechanism responsible orbit.

as result of high eccentricity, planet s distance star varies 0.03 0.88 au. @ apastron receive insolation similar of earth, while @ periastron insolation around 800 times greater, far more experienced mercury in solar system. in 2009, eclipse of hd 80606 b parent star detected, allowing measurements of planet s temperature made planet passed through periastron. these measurements indicated temperature rose around 800 k (500 °c / 1000 °f) 1500 k (1200 °c / 2200 °f) in 6 hours.

an observer above cloud tops of gas giant see parent star swell 30 times apparent size of sun in our own sky.

hd 80606 b - animation (01:28) (28 march 2016).

the transit detected using celestron 35-cm schmidt–cassegrain telescope. prior large data release of kepler mission in february 2011, hd 80606 b has longest orbital period of known transiting planet. takes 12.1 hours transit star.

the transit of 14 january 2010 partially observed most; there equipment failures on part of time, , 8 january secondary transit entirely lost. midpoint of next transit 1 february 2013 11:37 ut.