55 Cancri b is a gas giant exoplanet that orbits a G-type star, like the Sun. It has a mass 0.83 x that of Jupiter, takes 14.65 days to complete one orbit of its star, and is 0.115 AU from its star. Its discovery was announced in January 1997. In 2015, the public voted to give it the name "Galileo," which was approved by the International Astronomical Union, after the father of observational astronomy. The other planets in the system are also named for famous astronomers and telescope inventors of the Renaissance.

PLANET TYPE
Gas Giant
DISCOVERY DATE
1996
MASS
0.8306 Jupiters
PLANET RADIUS
Unknown
ORBITAL RADIUS
0.115227 AU
ORBITAL PERIOD
14.7 days
ECCENTRICITY
0.0034
DETECTION METHOD
Radial Velocity