HD 59686 b is an extrasolar planet that orbits at 91.1% of distance between Earth and the Sun or 0.911 AU in a very circular orbit of the giant star HD 59686. It has an orbital period of 303 Earth Days. Not much is known written about it on wikipedia. It orbits a star called HD 59686.
HD 59686 is a binary star system in the northern constellation of Gemini. It is visible to the naked eye as a dim point of light with an apparent visual magnitude of +5.45. The distance to this system is approximately 292 light years based on parallax, but it is drifting closer with a radial velocity of −34 km/s.
This is a single-lined spectroscopic binary system with an orbital period of 32.0 years and a high eccentricityof 0.73. The visible component is an aging giant star with a stellar classification of K2III, meaning it has ceased fusing hydrogen in its core and on its way to becoming a red giant. The stellar radius is very large: 11.2 times that of our Sun. The star is around 2.7 billion years old with 1.4 times the mass of our Sun. It is radiating 58 times the luminosity from its enlarged photosphere at an effective temperature of 4,670 K.
The secondary component has a minimum mass 53% that of the Sun, which indicates it must be a star rather than a brown dwarf or a planet.
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