artist rendition
Artist's concept

K2-138 c is a Neptune-like exoplanet that orbits a G-type star. Its mass is Unknown, it takes 3.6 days to complete one orbit of its star, and is 0.04454 AU from its star. Its discovery was announced in 2017.

PLANET TYPE
Neptune-like
DISCOVERY DATE
2017
MASS
Unknown
PLANET RADIUS
0.225 x Jupiter
ORBITAL RADIUS
0.04454 AU
ORBITAL PERIOD
3.6 days
ECCENTRICITY
0.296
DETECTION METHOD
Transit