It is 19 times more massive than the Sun and has expanded to a size of 203 solar radii. Deneb is estimated to have between 20 and 25 times the sun's mass, showing it to be a low density star which is expected for a supergiant. As a result of strong stellar winds, it … It is one of the stars that form the Summer Triangle, along with Altair in Aquila constellation and Vega in Lyra.. Deneb is also the brightest star of the Northern Cross, another prominent summer asterism found in the northern skies. In 2364, Deneb IV was at the edge of "the great unexplored mass of the galaxy". It shines with an apparent visual magnitude of 1.25 and an absolute magnitude of -8.4 making it approximately 200,000 times more luminous than the Sun. Click on image for full size. Deneb, Alpha Cygni, is the brightest star in Cygnus constellation and the most distant of all first magnitude stars.. Deneb is a luminous blue supergiant. The star is a pulsating Alpha Cygnus variable type which means that its size changes over time. In 9,800 years, Deneb will be our temporary pole star and within 7 degrees of the north celestial pole due to Earth’s precession. This was the homeworld of the Bandi, a telepathic humanoid species, and the Denebian slime devil. Deneb brightness ranges from a magnitude of 1.338 to a magnitude of 1.273 over its variable period. With an estimated temperature of 8,525 K, it is 196,000 times more luminous than the Sun. Deneb, (Arabic: “Tail” [of the Swan, Cygnus]) one of the brightest stars, with an apparent magnitude of 1.25. Star type Deneb is a blue-white supergiant of the spectral type A2 Ia. Variable Type of Deneb. Deneb is the brightest star in the Cygnus constellation and the 19th overall in the night sky. This star, at about 1,500 light-years’ distance, is the most remote (and brightest intrinsically) of the 20 apparently brightest stars. White dwarfs are the smallest type stars, with a similar size to earth, and with extreme mass. Betelgeuse (Alpha Orionis) is approximately 1,000 times larger than our Sun, whereas Deneb (Alpha Cygni) is estimated to be only 200-300 times the size of our Sun. Deneb’s Size and Age in Perspective: If our sun was the size of a marble, the diameter of Deneb would be equal to the size of a a prison cell. It lies in the northern constellation Cygnus and, Deneb IV was the inhabited fourth planet orbiting the primary Deneb. Deneb is a true supergiant, its diameter, calculated from its temperature and luminosity, is 108 times that of the Sun, half the size of Earth's orbit. However, the size of Deneb is estimated to be 108 times that of our star, so that if Deneb was at the center of our Solar System its diameter would extent to half as far as the orbit of the Earth. The Variable Type is usually named after the first star of that type to be spotted. 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