AlkaphrahvsCastor B
Castor B has a higher Absolute Magnitude (2 vs -2 mag), while Alkaphrah has a higher Luminosity (393 vs 16 × Sun), while Alkaphrah has a higher Distance (358 vs 52 light-years).
Brightness
4
Apparent Magnitude
3
-2
Absolute Magnitude
2
393
Luminosity
16
Physical Properties
358
Distance
52
10,039
Surface Temperature
N/A
0
Color Index (B-V)
N/A
Position
9
Right Ascension
8
47
Declination
32
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Data sourced from HYG Database (Free for any purpose, including commercial).