We report on the discovery of a hot Jupiter-type exoplanet , CoRoT-17b , detected by the CoRoT satellite .
It has a mass of 2.43 \pm 0.30 \mathrm { M } _ { Jup } Â and a radius of 1.02 \pm 0.07 \mathrm { R } _ { Jup } , while its mean density is 2.82 \pm 0.38 g/cm ^ { 3 } .
CoRoT-17b is in a circular orbit with a period of 3.7681 \pm 0.0003 days .
The host star is an old ( 10.7 \pm 1.0 Gyr ) main-sequence star , which makes it an intriguing object for planetary evolution studies .
The planet ’ s internal composition is not well constrained and can range from pure H/He to one that can contain \sim 380 earth masses of heavier elements .