AlfirkvsCastor B
Castor B has a higher Absolute Magnitude (2 vs -3 mag), while Alfirk has a higher Luminosity (1,962 vs 16 × Sun), while Alfirk has a higher Distance (685 vs 52 light-years).
Brightness
3
Apparent Magnitude
3
-3
Absolute Magnitude
2
1,962
Luminosity
16
Physical Properties
685
Distance
52
13,609
Surface Temperature
N/A
0
Color Index (B-V)
N/A
Position
21
Right Ascension
8
71
Declination
32
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Data sourced from HYG Database (Free for any purpose, including commercial).