Across all wavelengths, is estimated to be the more luminous of the two, 6, 300, 000 times the Sun's luminosity ( absolute bolometric magnitude-12.25 ) compared to at 5, 000, 000 times the Sun's luminosity ( absolute bolometric magnitude-12.0 ).
32.
A cool star, it has a surface temperature of around 2, 900 K and a radius 234 times that of the sun, with a bolometric absolute magnitude of & minus; 4.13 and distance estimated at 443 or 445 parsecs ( 1444-1450 ) light-years based on bolometric magnitude or radius.
33.
IAU 2015 Resolution B2 proposed an absolute bolometric magnitude scale where \ scriptstyle M _ { bol } = 0 corresponds to luminosity 3.0128e28 Watts, with the zero point luminosity chosen such that the Sun ( with nominal luminosity 3.828e26 Watts ) corresponds to absolute bolometric magnitude \ scriptstyle M _ { bol _ { \ rm Sun } } = 4.74.
34.
IAU 2015 Resolution B2 proposed an absolute bolometric magnitude scale where \ scriptstyle M _ { bol } = 0 corresponds to luminosity 3.0128e28 Watts, with the zero point luminosity chosen such that the Sun ( with nominal luminosity 3.828e26 Watts ) corresponds to absolute bolometric magnitude \ scriptstyle M _ { bol _ { \ rm Sun } } = 4.74.
35.
Placing a radiation source ( e . g . star ) at the standard distance of 10 parsecs, it follows that the zero point of the apparent bolometric magnitude scale \ scriptstyle m _ { bol } = 0 corresponds to irradiance \ scriptstyle f _ { o } = 2.518 021 002 . . . e-8 \ W / m ^ 2, where the nominal total solar irradiance measured at 1 astronomical unit ( 1361 W / m 2 ) corresponds to an apparent bolometric magnitude of the Sun of \ scriptstyle m _ { bol _ { \ rm Sun } } =-26.832.
36.
Placing a radiation source ( e . g . star ) at the standard distance of 10 parsecs, it follows that the zero point of the apparent bolometric magnitude scale \ scriptstyle m _ { bol } = 0 corresponds to irradiance \ scriptstyle f _ { o } = 2.518 021 002 . . . e-8 \ W / m ^ 2, where the nominal total solar irradiance measured at 1 astronomical unit ( 1361 W / m 2 ) corresponds to an apparent bolometric magnitude of the Sun of \ scriptstyle m _ { bol _ { \ rm Sun } } =-26.832.
