AlsafivsCastor B
Castor B has a higher Luminosity (16 vs 0 × Sun), while Alsafi has a higher Absolute Magnitude (6 vs 2 mag), while Castor B has a higher Distance (52 vs 19 light-years).
Brightness
5
Apparent Magnitude
3
6
Absolute Magnitude
2
0
Luminosity
16
Physical Properties
19
Distance
52
5,323
Surface Temperature
N/A
1
Color Index (B-V)
N/A
Position
20
Right Ascension
8
70
Declination
32
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Data sourced from HYG Database (Free for any purpose, including commercial).