K2-138 d is a Neptune-like exoplanet that orbits a K-type star. Its mass is 6.62 Earths, it takes 5.4 days to complete one orbit of its star, and is 0.0575 AU from its star. Its discovery was announced in 2017.

PLANET TYPE
Neptune-like
DISCOVERY DATE
2017
MASS
6.62 Earths
PLANET RADIUS
0.219 x Jupiter
ORBITAL RADIUS
0.0575 AU
ORBITAL PERIOD
5.4 days
ECCENTRICITY
< 0.348
DETECTION METHOD