About this world
OGLE-2012-BLG-0838L b is a Neptune-like planet orbiting OGLE-2012-BLG-0838L, a star 20.6 thousand light-years from Earth. It is about 0.75 times the size of Jupiter (its size estimated from its mass) and holds 0.17 Jupiter masses.
At its size it almost certainly keeps a deep envelope of hydrogen and helium.
It was discovered in 2020 by microlensing with OGLE. A foreground star's gravity magnifies a background star; a planet adds a blip.