AchernarvsCastor
Castor has a higher Declination (32 vs -57 °), while Castor has a higher Absolute Magnitude (1 vs -3 mag), while Castor has a higher Color Index (B-V) (0 vs 0).
Brightness
0
Apparent Magnitude
2
-3
Absolute Magnitude
1
1,052
Luminosity
49
Physical Properties
139
Distance
51
12,650
Surface Temperature
9,720
0
Color Index (B-V)
0
Position
2
Right Ascension
8
-57
Declination
32
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Data sourced from HYG Database (Free for any purpose, including commercial).