artist rendition
Artist's concept

HD 90156 b is a Neptune-like exoplanet that orbits a G-type star. Its mass is at least 17.98Earths, it takes 49.8 days to complete one orbit of its star, and is 0.25 AU from its star. Its discovery was announced in 2009.

PLANET TYPE
Neptune-like
DISCOVERY DATE
2009
MASS
at least 17.98Earths
PLANET RADIUS
Unknown
ORBITAL RADIUS
0.25 AU
ORBITAL PERIOD
49.8 days
ECCENTRICITY
0.31
DETECTION METHOD
Radial Velocity