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How Old is OGLE-TR-122b?

-- Arianna | December 3, 2019

Question:

About how old is Ogle-tr-122b?

-- Arianna

Answer:

OGLE-TR-122b is the low-mass companion in an eclipsing binary system composed of a solar-type primary and a very low mass secondary close to the Hydrogen-burning limit reported in 2004.  Evolutionary models of the age of low-mass stars like OGLE-TR-122b suggest that it is in the range of 1 to 15 billion years, with a best-estimate of about 5 billion years.

-- Jeff Mangum