MOA-2007-BLG-197Lb is a

brown dwarf Brown dwarfs are substellar objects that have more mass than the biggest gas giant planets, but less than the least massive main sequence, main-sequence stars. Their mass is approximately 13 to 80 Jupiter mass, times that of Jupiter ()not big en ...

discovered in August 2015 by the MOA collaboration. It is the first brown dwarf found by the microlensing method to orbit a solar-type star.

References

Astronomical objects discovered in 2015 Gravitational lensing Brown dwarfs {{Brown-dwarf-stub