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BD+14 4559
Orange-hued star in the constellation Pegasus From Wikipedia, the free encyclopedia
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BD+14 4559 is a star with an exoplanetary companion in the northern constellation of Pegasus. During the 2019 NameExoWorlds campaign, the star was named Solaris by Poland after a 1961 science fiction novel about an ocean-covered exoplanet by Polish writer Stanisław Lem.[6] With an apparent visual magnitude of 9.78,[2] the star is too faint to be viewed with the naked eye. The system is located at a distance of 161 light-years from the Sun based on parallax measurements, but is drifting closer with a radial velocity of −44 km/s.[1] It is a high proper motion star,[3] traversing the celestial sphere at an angular rate of 0.234″ yr−1.[7]
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This is an ordinary K-type main sequence star with a stellar classification of K2V.[3] The age of the star is poorly constrained, but is estimated to be roughly seven billion years. It has 82% of the mass and 78% of the radius of the Sun.[4] The star is radiating 48%[3] of the net luminosity of the Sun from its photosphere at an effective temperature of 4,948 K.[4] It has a higher metallicity – the abundance of elements of higher atomic number than helium – compared to the Sun.[3]
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Planetary system
On June 10, 2009, an exoplanet (Pirx) was found in orbit by Niedzielski et al. using the Hobby-Eberly Telescope.[3] It has a minimum mass of one and a half Jupiter masses (MJ). The orbit of this object is highly eccentric and it spends 65% of its orbital period in the star's habitable zone.[8] A 2020 analysis of data from the Gaia mission has set a 3-sigma upper limit to its mass of 49.83 MJ.[9] There may be an undetected second planet orbiting the star, however this is unconfirmed.[3]
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See also
References
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