GJ 581 c is a Neptune-like exoplanet that orbits a K-type star. Its mass is 5.5 Earths, it takes 12.9 days to complete one orbit of its star, and is 0.0721 AU from its star. Its discovery was announced in 2007.

PLANET TYPE
Neptune-like
DISCOVERY DATE
2007
MASS
5.5 Earths
PLANET RADIUS
2.21 x Earth
(estimate)
ORBITAL RADIUS
0.0721 AU
ORBITAL PERIOD
12.9 days
ECCENTRICITY
0.0
DETECTION METHOD