AlphardvsCastor B
Castor B has a higher Absolute Magnitude (2 vs -2 mag), while Castor B has a higher Declination (32 vs -9 °), while Alphard has a higher Luminosity (426 vs 16 × Sun).
Brightness
2
Apparent Magnitude
3
-2
Absolute Magnitude
2
426
Luminosity
16
Physical Properties
180
Distance
52
3,886
Surface Temperature
N/A
1
Color Index (B-V)
N/A
Position
9
Right Ascension
8
-9
Declination
32
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Data sourced from HYG Database (Free for any purpose, including commercial).