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Proper NameGalileo
DesignationsCopernicus b, Rho1 Cancri b, 55 Cancri b, HD 75732 b
Also sometimes specified as Rho1 Cancri A b, 55 Cancri A b, HD 75732 A b
ClassificationGas Giant
Orbital Period14 days, 16 hours
Mean Distance from Copernicus17.0 million km
0.11 AU
Mass0.80 x Jupiter
DiameterNot known
TemperatureNot known
Parent starCopernicus (Rho1 Cancri, 55 Cancri), yellow dwarf in Cancer
Other planets in this systemBrahe (Copernicus c), gas giant
Harriot (Copernicus f), gas giant
Janssen (Copernicus e), super Earth
Lipperhey (Copernicus d), gas giant
NotesRho1 Cancri or 55 Cancri is a binary system, within which the component Rho1 Cancri A is an orange star named Copernicus. The star has five known planets, four of which are gas giants, and Galileo is the most massive of these. Galileo follows a close orbit of the star Copernicus, with only the inner planet Janssen (a rather less massive gas giant) orbiting closer to the star.

Imagery provided by Aladin sky atlas