AlkaidvsCastor
Castor has a higher Absolute Magnitude (1 vs -1 mag), while Castor has a higher Color Index (B-V) (0 vs 0), while Alkaid has a higher Luminosity (161 vs 49 × Sun).
Brightness
2
Apparent Magnitude
2
-1
Absolute Magnitude
1
161
Luminosity
49
Physical Properties
104
Distance
51
11,556
Surface Temperature
9,720
0
Color Index (B-V)
0
Position
14
Right Ascension
8
49
Declination
32
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Data sourced from HYG Database (Free for any purpose, including commercial).