Absolute Visual Magnitude(II)
Betelgeuse
Rigel
244 pc
152 pc
d
-6.8
-5.5
MV
0.14
0.41
mV
Rigel
Betelgeuse
Back to our example of Betelgeuse and Rigel:
Difference in absolute
magnitudes: 6.8 – 5.5 = 1.3
=> Luminosity ratio = (2.512)1.3 = 3.3
