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. With an estimated temperature of 8,525 K, it is 196,000 times more luminous than the Sun. Compared to the size of our galaxy, is Deneb truly distant? As a result of strong stellar … The Deneb Algedi's solar mass is 2.00 times that of our star, the Sun. Deneb has a spectral type of A2Ia, a surface temperature of 8525° Kelvin and a luminosity 54,000 times the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 164,137,528.53.km. Deneb is a blue-white supergiant of the spectral type A2 Ia. Deneb estimated radius has been calculated as being 235.90 times bigger than the Sun. Deneb along with Altair and Vega For example, below is a list of some of the largest stars in our galaxy and how they compare to our Sun: Mu Cephi - about 1500 times the size of our sun; Betelgeuse - about 900 times the size of our sun ; Antares - about 530 times the size of our sun ; Deneb - about 145 times the size of our sun Since the age of Deneb is difficult to determine, I’m not going to provide an age comparison here. Deneb is only 1.4% of the diameter of the Milky Way distant from the Sun! Created by the San Francisco-based artist Roberto Ziche, the image features the Sun in the background with the planets, Moon and the four dwarf planets lined up in the foreground in the relative scale of size to one another. The Sun's Mass is 1,989,100,000,000,000,000,000 billion kg. So there is 8 million times more space in a sphere around the Sun that ends at Deneb, than there is from the Sun out to 15 light-years. Deneb is the most distant bright star in Earth's sky, lying thousands of light-years away from Earth. (Its exact distance is uncertain.) It is 19 times more massive than the Sun and has expanded to a size of 203 solar radii. Deneb is not truly distant – dot A is closest to representing is location relative to the Sun, and it is barely a separate dot from the Sun. The ratio of the volumes is then V Deneb /V Nearby =3000 3 /15 3 =8*10 6. To give idea of size, the Sun is 99.86% the mass of the solar system. Explain your reasoning. Deneb is almost twice as hot as our sun, with average temperatures estimated at around 8.525 K. Deneb is around 19 times more massive than our sun, and it has an incredible radius of 203 solar radii, and as such, a diameter of more than 200 times that of the sun. The image above shows the uncropped view of Deneb (North is up) through the Takahashi E-180 Astrograph. It has a mass of 20 solar masses and a diameter 110 times the Sun. 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