Antares has a radius of about 680 to 800 times that of the Sun. This gives Antares a diameter between 947 to 1.114 billion kilometers in size. If Antares was placed in the center of our solar system, its outer surface would lie between the orbits of Mars and Jupiter, in the asteroid belt. Antares is about 550 light-years (or 170 parsecs) from the Earth. Its visual luminosity is about 10,000 times that of the Sun. Because the star radiates much of its energy in the infrared part of the spectrum, the bolometric luminosity is about 65,000 times that of the Sun. The mass of the star is in the range of 15 to 18 solar masses.