OGLE-TR-122b

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OGLE-TR-122b is the smallest star (not a brown dwarf) in terms of volume yet discovered (2005). It was discovered with the Optical Gravitational Lensing Experiment survey (OGLE). It orbits another star nearer the center of the Milky Way, completing one orbit in 7.3 days.

It is:

16% larger than Jupiter by volume, making it smaller than some extrasolar planets
50x denser than the Sun
95x more massive than Jupiter

External links

http://www.space.com/scienceastronomy/050303_star_small.html

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