But since the mass of the object had not been measured, it was not clear that it was a true planet, low-mass red dwarf or something else.

[1] In 2004 radial velocity measurements showed unambiguously that the transiting body is indeed a planet.

Its mass is about half that of Jupiter and it orbits the star at a distance less than 1/20th that of Earth from the Sun.

OGLE-TR-111b has similar mass and orbital distance as the first transiting planet, HD 209458 b (Osiris).

However, those other planets tend to be more massive and orbit even closer than typical hot Jupiters.