Castor BvsMerak
Castor B has a higher Absolute Magnitude (2 vs 0 mag), while Merak has a higher Luminosity (60 vs 16 × Sun), while Merak has a higher Declination (56 vs 32 °).
Brightness
3
Apparent Magnitude
2
2
Absolute Magnitude
0
16
Luminosity
60
Physical Properties
52
Distance
80
N/A
Surface Temperature
9,731
N/A
Color Index (B-V)
0
Position
8
Right Ascension
11
32
Declination
56
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Data sourced from HYG Database (Free for any purpose, including commercial).