Kepler-23c
Kepler-23c is a Neptune-sized exoplanet orbiting the star Kepler-23, located in the constellation Cygnus. The planet is 3.12 times wider than the Earth and is 0.189 Jupiter masses. The planet was discovered using data taken from the Kepler [space telescope]. It is likely a gas giant. The planets Kepler-23b and d both reside in the same planetary system.