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Qatar-1
Star in the constellation Draco From Wikipedia, the free encyclopedia
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Qatar-1 is an orange main sequence star in the constellation of Draco.
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Star characteristics
Qatar-1 has an average to high metallicity of 160% of solar,[1] and is of similar age to Sun.[2] The star has significant starspot activity.[4]
Planetary system
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The "Hot Jupiter" class planet Qatar-1b was discovered by the Qatar Exoplanet Survey in 2010.[1] The planetary orbit is likely aligned with the rotational axis of the star, with the misalignment measurement based on the Rossiter-McLaughlin effect equal to −8.4±7.1 degrees.[2] The planet has a large measured temperature difference between dayside (1696±39 K) and nightside (1098±158 K).[5] A spectroscopic study in 2017 does suggest that Qatar-1b has relatively clear skies with a few clouds.[6]
Additional planets or a brown dwarf in the system were suspected in 2013,[7] but were refuted in 2015.[8][9]
The transit-timing variation search in 2020 has also resulted in no detection of additional planets in the system,[10][11] although by 2022 additional transit-timing variation data have suggested the planetary system is accelerating under influence of the unseen long-period companion.[12]
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References
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