CastorvsMirfak
Castor has a higher Absolute Magnitude (1 vs -4 mag), while Mirfak has a higher Luminosity (4,040 vs 49 × Sun), while Mirfak has a higher Color Index (B-V) (0 vs 0).
Brightness
2
Apparent Magnitude
2
1
Absolute Magnitude
-4
49
Luminosity
4,040
Physical Properties
51
Distance
506
9,720
Surface Temperature
6,476
0
Color Index (B-V)
0
Position
8
Right Ascension
3
32
Declination
50
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Data sourced from HYG Database (Free for any purpose, including commercial).