OGLE-2005-BLG-169L is a dim and distant magnitude 20 galactic bulge star located about 2,700 parsecs away in the constellation Sagittarius.
If it is a main sequence star, then it is most likely a red dwarf with about half of the mass of the Sun.
Other possibilities are a white dwarf star, or (less likely) a neutron star or black hole.
[1] In 2006, an Uranus-mass extrasolar planet was detected by gravitational microlensing around this star.
This article about a red dwarf is a stub.