CFBDSIR 2149-0403
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CFBDSIR 2149-0403 (full designation CFBDSIR J214947.2-040308.9) is a brown dwarf and probable rogue planet,[1] likely (with 87% probability) part of the AB Doradus moving group as indicated by its position and proper motion.[1] Its age is estimated to be between 20 and 200 million years.
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Discovery
CFBDSIR 2149-0403 has been discovered by the Canada-France Brown Dwarfs Survey, a near infrared sky survey, and confirmed by WISE data.
Distance
As of November 2012, this rogue planet is the closest that has ever been spotted.[2] If the object belongs to the AB Doradus moving group then its distance is estimated to be 40±4 parsecs (130±13 light years) from Earth; other possible estimates range from 25 to 50 parsecs.
Atmosphere
Spectroscopy observations have found absorption by gaseous methane and water.
