AlpheratzvsCastor
Castor has a higher Color Index (B-V) (0 vs 0), while Castor has a higher Absolute Magnitude (1 vs 0 mag), while Castor has a higher Right Ascension (8 vs 0 h).
Brightness
2
Apparent Magnitude
2
0
Absolute Magnitude
1
114
Luminosity
49
Physical Properties
97
Distance
51
10,625
Surface Temperature
9,720
0
Color Index (B-V)
0
Position
0
Right Ascension
8
29
Declination
32
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Data sourced from HYG Database (Free for any purpose, including commercial).