K2-9 b is a Neptune-like exoplanet that orbits a M-type star. Its mass is 5.69 Earths, it takes 18.4 days to complete one orbit of its star, and is 0.091 AU from its star. Its discovery was announced in 2015.

PLANET TYPE
Neptune-like
DISCOVERY DATE
2015
MASS
5.69 Earths
PLANET RADIUS
0.201 x Jupiter
ORBITAL RADIUS
0.091 AU
ORBITAL PERIOD
18.4 days
ECCENTRICITY
0.0
DETECTION METHOD