About this world
OGLE-2013-BLG-1721L b is a gas giant orbiting OGLE-2013-BLG-1721L, a star 20.5 thousand light-years from Earth. It is about 1.3 times the size of Jupiter (its size estimated from its mass) and holds 0.63 Jupiter masses.
At its size it almost certainly keeps a deep envelope of hydrogen and helium.
It was discovered in 2017 by microlensing with OGLE. A foreground star's gravity magnifies a background star; a planet adds a blip.