High Quality Content by WIKIPEDIA articles! XO-4b is an extrasolar planet approximately 956 light years away in the constellation of Lynx. This planet was found by the transit method by McCullough in May 2008. The planet has mass 1.72 MJ and radius 1.34 RJ. This planet orbits very close to the F-type parent star, as it is typical for transiting planets, classing this planet as Hot Jupiter. It takes only 4.125 days (or 99 hours) to orbit at a distance of 8.3 gigameters (0.0555 AU) away from the star. As it is typical for hot Jupiters, the planet orbits in a circular path (circularity 0.9976). This planet may have clouds made of lithium, sodium, and potassium in the upper atmosphere, and silicate clouds deeper in the atmosphere.

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