The XXIXth IAU General Assembly in Honolulu adopted IAU 2015 Resolution B2 on recommended zero points for the absolute and apparent bolometric magnitude scales.
12.
Bolometric correction is the correction made to the absolute magnitude of an object in order to convert an object's visible magnitude to its bolometric magnitude.
13.
The International Astronomical Union voted on Resolution B2 regarding the zero points of the bolometric magnitude scale at the IAU General Assembly in Honolulu in August 2015.
14.
Summing radiation at all wavelengths gives a luminosity of around ( bolometric magnitude & minus; 8.8 ), making it one of the largest stars so far discovered.
15.
The choice of adopted solar absolute magnitude, bolometric correction, and absolute bolometric magnitude are not arbitrary, although some classic references have tabulated mutually incompatible values for these quantities.
16.
Although bolometric magnitudes have been in use for over eight decades, there have been systematic differences in the absolute magnitude-luminosity scales presented in various astronomical references with no international standardization.
17.
Nowadays there is a mess of derived terms-" Absolute Visual Magnitude ", " Absolute photographic magnitude ", " Absolute bolometric magnitude "-and they're all different.
18.
Although bolometric magnitudes had been used by astronomers for many decades, there had been systematic differences in the absolute magnitude-luminosity scales presented in various astronomical references, and no international standardization.
19.
Its spectral type has been previously classified as B2III to B2V and its bolometric magnitude as-4.89 . The system is between 1250 and 8000 times as luminous as the Sun.
20.
"' Cygnus OB2 # 12 "'is an extremely bright blue hypergiant with an absolute bolometric magnitude ( all electromagnetic radiation ) of & minus; 10.9, among the galaxy.
