"Only" 5 times bigger than Earth, orbits a red dwarf star, and is 22,000 LY away
Smallest extrasolar planet revealed by microlensing
Astronomers have found an extrasolar planet that may be just 5.5
times as massive as the Earth – that would make it the smallest
exoplanet ever detected around a normal star.
It orbits a common red dwarf star, 22,000 light years from the Sun,
and was found using a technique called gravitational microlensing.
The planet is too far from its host star - and therefore too cold -
to harbour life as we know it, but the new find offers hope that
there are smaller, warmer worlds out there waiting to be found.
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http://www.newscientistspace.com/article/dn8633