artist rendition
Artist's concept

HD 128311 c is a gas giant exoplanet that orbits an unknown-type star. Its mass is 3.789 Jupiters, it takes 2.5 years to complete one orbit of its star, and is 1.74 AU from its star. Its discovery was announced in 2005.

PLANET TYPE
Gas Giant
DISCOVERY DATE
2005
MASS
3.789 Jupiters
PLANET RADIUS
Unknown
ORBITAL RADIUS
1.74 AU
ORBITAL PERIOD
2.5 years
ECCENTRICITY
0.159
DETECTION METHOD
Radial Velocity