About this world
MOA-2009-BLG-387L b is a gas giant orbiting MOA-2009-BLG-387L, a star 18.6 thousand light-years from Earth. It is about 1.2 times the size of Jupiter (its size estimated from its mass) and holds 2.6 Jupiter masses. It completes an orbit every 5.42 years at 1.8 AU from its star.
At its size it almost certainly keeps a deep envelope of hydrogen and helium.
It was discovered in 2010 by microlensing with MOA. A foreground star's gravity magnifies a background star; a planet adds a blip.