Tags: Star.
Kepler-16 is a binary star system in the constellation of Cygnus that was targeted by the Kepler spacecraft. Both stars are smaller than the Sun; the primary Kepler-16A is a K-type main-sequence star and the secondary Kepler-16B is an M-type red dwarf. They are separated by 0.22 AU and complete an orbit around a common center of mass every 41 days.The system is host to one known extrasolar planet in circumbinary orbit: the Saturn-sized Kepler-16b.