Castor BvsRegulus
Castor B has a higher Absolute Magnitude (2 vs -1 mag), while Regulus has a higher Luminosity (147 vs 16 × Sun), while Castor B has a higher Declination (32 vs 12 °).
Brightness
3
Apparent Magnitude
1
2
Absolute Magnitude
-1
16
Luminosity
147
Physical Properties
52
Distance
79
N/A
Surface Temperature
11,359
N/A
Color Index (B-V)
0
Position
8
Right Ascension
10
32
Declination
12
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Data sourced from HYG Database (Free for any purpose, including commercial).