HD 40307 b is a Neptune-like exoplanet that orbits a K-type star. Its mass is at least 4 Earths, it takes 4.3 days to complete one orbit of its star, and is 0.0468 AU from its star. Its discovery was announced in 2009.

PLANET TYPE
Neptune-like
DISCOVERY DATE
2009
MASS
at least 4 Earths
PLANET RADIUS
Unknown
ORBITAL RADIUS
0.0468 AU
ORBITAL PERIOD
4.3 days
ECCENTRICITY
0.2
DETECTION METHOD
Radial Velocity