OGLE-TR-122

OGLE -TR- 122 is a covering variable binary star system with an orbital period of about 7.3 days in the constellation Carina. The smaller companion, the red dwarf OGLE -TR- 122b is the smallest main-sequence star for which there is a direct measurement of the radius. The mass of OGLE -TR- 122b is estimated to about 0.1 solar masses ( about 100 Jupiter masses), its radius to 0.1 solar radii.