About this world
KMT-2017-BLG-0165L b is a Neptune-like planet orbiting KMT-2017-BLG-0165L, a star 14.8 thousand light-years from Earth. It is about 0.58 times the size of Jupiter (its size estimated from its mass) and holds 0.11 Jupiter masses.
At its size it almost certainly keeps a deep envelope of hydrogen and helium.
It was discovered in 2018 by microlensing with KMTNet. A foreground star's gravity magnifies a background star; a planet adds a blip.