2MASS J21171431-2940034
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2MASS J21171431-2940034 is a 7-Jupiter-mass T0-type sub-brown dwarf located just over 62 light years away, in the Beta Pictoris moving group. In 2024, a transit signal was observed, suggesting the existence of a transiting exoplanet/exomoon 77% the size of Earth orbiting the star every 1.5 days
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