a star spins, is estimated at 2.2 billion years, far younger than the Sun. It is also hotter, with an effective temperature of 6395 K. With a metallicity of 0.12, Kepler-14 has 132% more iron than the amount measured in the Sun. Characteristics Kepler-14b is the sole planet discovered in the Kepler-14 system to date. The planet orbits the primary star in the Kepler-14 binary system. Kepler-14b is estimated to have 8.40 Jupiter masses and 1.136 Jupiter radii. In other words, the planet is 8.4 times more massive than Jupiter, but only 1.136 times Jupiter's size. This equates to a high density, which is measured at 7.1 g cm−3. According to the Extrasolar Planets Encyclopaedia, which calculated Kepler-14b's eccentricity independently, Kepler-14b has a slightly irregular orbit, with an orbital eccentricity of 0.035. Kepler-14b takes approximately 6.79 days to orbit its host star. The mean distance from its host star is about 8.213 times the measured radius of Kepler-14. The authors of Kepler-14b's discovery paper noted that, had they not discovered that Kepler-14 was indeed a binary system, the parameters for Kepler-14b would have been extremely inaccurate. They noted that other planets discovered using radial velocity measurements might not have accounted for the possibility that their host stars were binary systems; the only way that this was definitely known in the case of Kepler-14 was through the use of high-resolution imaging. If the less prominent portion of the Kepler-14 binary system had not been detected, Kepler-14b's mass would have been incorrect by nearly 60%, and its radius too small by about 10%. References Exoplanets discovered in 2011 Hot Jupiters Giant planets Transiting exoplanets Lyra (constellation) 14b