artist rendition
Artist's concept

HD 40307 b is a gas giant exoplanet that orbits a K-type star. Its mass is at least 4Earths, 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
Gas Giant
DISCOVERY DATE
2009
MASS
at least 4Earths
PLANET RADIUS
Unknown
ORBITAL RADIUS
0.0468 AU
ORBITAL PERIOD
4.3 days
ECCENTRICITY
0.2
DETECTION METHOD
Radial Velocity