artist rendition
Artist's concept

Kepler-138 d is a Super Earth exoplanet that orbits a K-type star. Its mass is 0.64 Earths and it takes 23.1 days to complete one orbit of its star. Its discovery was announced in 2014.

PLANET TYPE
Super-earth
DISCOVERY DATE
2014
MASS
0.64 Earths
PLANET RADIUS
1.212 x Earth
ORBITAL RADIUS
Unknown
ORBITAL PERIOD
23.1 days
ECCENTRICITY
Unknown
DETECTION METHOD
Transit