AlkaphrahvsCastor
Castor has a higher Absolute Magnitude (1 vs -2 mag), while Alkaphrah has a higher Luminosity (393 vs 49 × Sun), while Alkaphrah has a higher Distance (358 vs 51 light-years).
Brightness
4
Apparent Magnitude
2
-2
Absolute Magnitude
1
393
Luminosity
49
Physical Properties
358
Distance
51
10,039
Surface Temperature
9,720
0
Color Index (B-V)
0
Position
9
Right Ascension
8
47
Declination
32
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Data sourced from HYG Database (Free for any purpose, including commercial).