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WASP-103
Star in the constellation Hercules From Wikipedia, the free encyclopedia
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WASP-103 is an F-type main-sequence star located 1,800 ± 100 light-years (550 ± 30 parsecs) away in the constellation Hercules. Its surface temperature is 6,110±160 kelvins (K). The star's concentration of heavy elements is similar to that of the Sun.[4] WASP-103 is slightly younger than the Sun at 4±1 billion years.[4] The chromospheric activity of the star is elevated due to interaction with the giant planet on a close-in orbit.[5]
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A multiplicity survey in 2015 found a suspected stellar companion to WASP-103, at a projected separation of 0.242″±0.016″.[7]
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Planetary system
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In 2014 one super-Jupiter planet, named WASP-103b, was discovered by the transit method.[8] The planet is orbiting its host star in 22 hours and may be close to the limit of tidal disruption.[2] Orbital decay was not detected by 2020.[9] In early 2022, the planet was popularized because of its shape similar to a potato.[10]
The planetary atmosphere contains water, and possibly hydrogen cyanide, titanium(II) oxide, or sodium.[11] The planet has an elevated carbon to oxygen molar fraction of 0.9[3] or 1.35+0.14
−0.17, therefore it is nearly certain to be a carbon planet.[12]
Though the planetary equilibrium temperature is 2,484±67 K, the planet is tidally locked to WASP-103 and has one side in permanent day and the other side in permanent night. A significant temperature difference exists between the night side and day side; the dayside temperature is 2,930±40 K, while the night side temperature is 1,880±40 K.[3]
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