Tags: Star.
VHK 83 (Var 83 in the VHK survey) is a luminous blue variable (LBV) in the constellation Triangulum in the Triangulum Galaxy. With its bolometric luminosity of at least 2240000 times that of the Sun (4500000 in some estimates) it was described as the brightest nonstable star in M33 and is one of the most luminous stars known.The brightness varies slowly and unpredictably over a 1-2 magnitude visual range and can remain approximately constant for many years.