artist rendition
Artist's concept

51 Peg b is a gas giant exoplanet that orbits a G-type star. Its mass is at least 0.472 Jupiters, it takes 4.2 days to complete one orbit of its star, and is 0.0527 AU from its star. Its discovery was announced in 1995.

PLANET TYPE
Gas Giant
DISCOVERY DATE
1995
MASS
at least 0.472 Jupiters
PLANET RADIUS
Unknown
ORBITAL RADIUS
0.0527 AU
ORBITAL PERIOD
4.2 days
ECCENTRICITY
0.013
DETECTION METHOD
Radial Velocity