Known Brightest Star
LBV 1806-20 is a hypergiant or possible binary star located 30,000–49,000 light-years from the Sun, towards the center of the galaxy. It's total mass is 130–150 Solar masses and luminosity about 38 million times that of the Sun!
It is invisible from the Solar system, because less than one billionth of its visible light reaches us, the rest being absorbed by intervening interstellar gas and dust, giving it an apparent brightness of 35th magnitude at visible wavelengths, or 8th magnitude at a near infrared wavelength of 2 micrometers.
It is believed that the star has 120 to 150 Solar masses.
It's absolute magnitude is ***8722;14.2 comparing to full moon's apparent magnitude of ***8722;12.74 and Sun's apparent magnitude of ***8722;26.8.
That means if the star is placed 32 light years from the earth, it would be brighter than moon !
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