Barnard's StarvsCastor
Castor has a higher Luminosity (49 vs 0 × Sun), while Barnard's Star has a higher Color Index (B-V) (2 vs 0), while Barnard's Star has a higher Absolute Magnitude (13 vs 1 mag).
Brightness
10
Apparent Magnitude
2
13
Absolute Magnitude
1
0
Luminosity
49
Physical Properties
6
Distance
51
3,691
Surface Temperature
9,720
2
Color Index (B-V)
0
Position
18
Right Ascension
8
5
Declination
32
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Data sourced from HYG Database (Free for any purpose, including commercial).