Tidal Quality of the Hot Jupiter WASP-12b

WASP-12b stands out among the planets of its class hot Jupiters because observed fast orbital decay attributed to tidal dissipation. The measured rate period change is P?orb=?29±3ms/yr= ?(9.2±1.0)×10?10s/s. In literature heretofore, all attempts explain this high were based on assumption that evolution dominated by tides in star. Since modified quality factor yellow dwarfs insufficient warrant such a rate, hypothesis was put forward star may actually be subgiant. Using latest data from Gaia mission, we deduce WASP-12 at 1.36M? an evolving dwarf early stage post-turn-off has not yet depleted hydrogen core. Its unremarkable position color-magnitude diagram and existence close orbiting red giants similar mass contradict abrupt boost due structural internal changes. On other hand, previous research neglected dissipation planet, assuming it negligible likely synchronisation rotation presumed factor. We critically reassess light recent astrometric results for Jupiter Saturn. Assuming structure our Saturn, find well explained planet. estimated value planet’s coincides almost precisely with Jupiter.