Deneb is a STAR located in the constellation of Cygnus. It is one of the brightest stars in the night sky and is part of the Summer Triangle asterism. Deneb is also the most distant of the three stars in the asterism, located at a distance of about 3, 550 light-years from Earth. It is a blue-white supergiant STAR with an absolute magnitude of -8.4, making it one of the most luminous stars known. Deneb is also a variable STAR, with its brightness varying by 0.2 magnitudes over a period of several days.