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Proper NamesThestias, Pollux b
DesignationsBeta Geminorum b, HD 62509 b
ClassificationGas Giant
Orbital Period1 year, 225 days
Mean Distance from Pollux253 million km
1.69 AU
Mass2.9 x Jupiter
DiameterNot known
Temperature483 K (210°C)
Parent starPollux, orange giant in Gemini
Other planets in this systemNone
NotesThestias is the only known planet orbiting the orange giant Pollux in Gemini. This is an enormously massive planet, estimated to approach three times the mass of Jupiter. It orbits its parent star at a distance of 1.7 AU, an orbital distance only slightly greater than that of Mars around the Sun.

Imagery provided by Aladin sky atlas


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