HD 13931 b is a gas giant exoplanet in the habitable zone of a G-type star. It is an extrasolar planet that orbits the G-type star HD 13931, which is located in the constellation Andromeda about 155 light years away. At an average distance of 5.15 AU or 770 Gm, this planet takes 11.55 years to orbit the star. It has a mass of 2.2 Jupiters, takes 11.6 years to complete one orbit around its star, and is 5.15 AU away from it. The eccentricity of the planet (0.02) is similar to that of Earth. This planet’s orbital distance ranges from 5.05 to 5.25 AU.
It was discovered in 2009, and its discovery was announced. On November 13, 2009, this planet was discovered using the radial velocity method from a spectrograph at Keck Observatory. It is an extrasolar planet (exoplanet) that orbits the star HD 13931 in the Andromeda constellation. A planet that orbits a star other than the Sun is known as an exoplanet. According to the most recent parallax records, the star is 144.26 light years or 44.23 parsecs from Earth. The planet’s orbital period, or year, is 4218 days, or 11.56 Earth years. By the end of a full year, the Earth will have completed 0.09 orbits around its star.
HD 13931 b is an exoplanet that orbits the star HD 13931, which is located approximately 152.5 light-years (46.8 pc) from our Solar System. Its discovery was made public in 2010. HD 13931 has an apparent magnitude of 7.6 and an absolute magnitude of 4.3. It is 1.0 times more massive and 1.2 times larger than our Sun. The surface temperature is 5829 degrees Celsius, and the spectral type is G0. The extrasolar planet HD 13931 b orbits the star HD 13931 every 4218.0 days at an orbital distance of 5.15 AU in this planetary system.
HD 13931 is a Sun-like star in the constellation Andromeda, located in the northern hemisphere. With an apparent visual magnitude of 7.60, it can be seen with binoculars or a small telescope but is too faint to be seen with the naked eye. This object is 155 light years away from the Sun, as determined by its parallax, and is moving away with a radial velocity of +30 km/s.
This is a regular G-type main-sequence star with the stellar classification G0V, indicating that it, like the Sun, generates energy through core hydrogen fusion. It is slightly bigger, hotter, brighter, and heavier than our Sun. The metal content is approximately 8% higher than that of the Sun, and it has a quiet (magnetically inactive) chromosphere. The star is estimated to be 6.8 billion years old and has a rotation period of about 26 days.
