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Thestias

Pollux b, Beta Geminorum b, HD 62509 b

Extrasolar Planet in Gemini

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Proper Names	Thestias, Pollux b
Designations	Beta Geminorum b, HD 62509 b
Classification	Gas Giant
Orbital Period	1 year, 225 days
Mean Distance from Pollux	253 million km 1.69 AU
Mass	2.9 x Jupiter
Diameter	Not known
Temperature	483 K (210°C)
Parent star	Pollux, orange giant in Gemini
Other planets in this system	None
Notes	Thestias 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.

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