ε Canis Majoris is a binary star. "In fact, Adhara, a class B (B2) bright giant, is quite the magnificent star," he wrote. Based on the spectral type, we can deduce that the surface temperature of the star is in the order of between between 10,000 and 25,000K based on the notes from Harvard University. If this star were at the same distance as Sirius, it would outshine all other stars in the sky and would appear 15 times brighter than the planet Venus. It emits a total radiation equal to 38,700 times that of the Sun. Physical Properties of Adhara Adhara Colour and Temperature . Based on the star's spectral type of B2II , Adhara's colour and type is blue luminous giant star. It emits 38,700 times more UV rays than the Sun. It emits a total radiation equal to 20,000 times that of the Sun. Adhara Luminosity. It is the strongest source of photons capable of ionizing hydrogenatoms in interstellar gas near the Sun, and is very important in determining the ionization stat… Adhara is a binary star, about 430 light years from Earth. The primary star is blueish-white (spectral type B2) with a high surface temperature (25,000° K). In addition, the surface temperature of this star is burning at an effective temperature of 22,200 Kelvins or 39,500 degrees Fahrenheit or 21,296 degrees Celsius, which is what gives it its blueish-white color. Adhara is also noted for being the brightest extreme ultraviolet source of any known star. Its color is blue or blueish-white, due to the surface temperature of 22,200K. The primary, ε Canis Majoris A, has an apparent magnitude of +1.5 and belongs to the spectral classification B2. This star is the brightest extreme ultraviolet source in the night sky.
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