HD 40307 d is a Neptune-like exoplanet that orbits a K-type star. Its mass is at least 9.5 Earths, it takes 20.4 days to complete one orbit of its star, and is 0.1321 AU from its star. Its discovery was announced in 2009.

PLANET TYPE
Neptune-like
DISCOVERY DATE
2009
MASS
at least 9.5 Earths
PLANET RADIUS
Unknown
ORBITAL RADIUS
0.1321 AU
ORBITAL PERIOD
20.4 days
ECCENTRICITY
0.07
DETECTION METHOD
Radial Velocity