AlphergvsCastor B
Castor B has a higher Absolute Magnitude (2 vs -2 mag), while Alpherg has a higher Luminosity (357 vs 16 × Sun), while Alpherg has a higher Distance (350 vs 52 light-years).
Brightness
4
Apparent Magnitude
3
-2
Absolute Magnitude
2
357
Luminosity
16
Physical Properties
350
Distance
52
4,806
Surface Temperature
N/A
1
Color Index (B-V)
N/A
Position
2
Right Ascension
8
15
Declination
32
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Data sourced from HYG Database (Free for any purpose, including commercial).