Barnard's StarvsCastor B
Castor B has a higher Luminosity (16 vs 0 × Sun), while Castor B has a higher Distance (52 vs 6 light-years), while Barnard's Star has a higher Absolute Magnitude (13 vs 2 mag).
Brightness
10
Apparent Magnitude
3
13
Absolute Magnitude
2
0
Luminosity
16
Physical Properties
6
Distance
52
3,691
Surface Temperature
N/A
2
Color Index (B-V)
N/A
Position
18
Right Ascension
8
5
Declination
32
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Data sourced from HYG Database (Free for any purpose, including commercial).