K2-21 b is a Neptune-like exoplanet that orbits a K-type star. Its mass is Unknown, it takes 9.3 days to complete one orbit of its star, and is 0.076 AU from its star. Its discovery was announced in 2015.

PLANET TYPE
Neptune-like
DISCOVERY DATE
2015
MASS
Unknown
PLANET RADIUS
1.84 x Earth
ORBITAL RADIUS
0.076 AU
ORBITAL PERIOD
9.3 days
ECCENTRICITY
0.1
DETECTION METHOD
Transit