About this world
MOA-2009-BLG-266L b is a sub-Neptune orbiting MOA-2009-BLG-266L, a star 9.92 thousand light-years from Earth. It is about 3.2 times the size of Earth (its size estimated from its mass) and holds 10 Earth masses. It completes an orbit every 7.67 years at 3.2 AU from its star.
At its size it almost certainly keeps a deep envelope of hydrogen and helium.
It was discovered in 2011 by microlensing with MOA. A foreground star's gravity magnifies a background star; a planet adds a blip.