AltairvsBarnard's Star
Altair has a higher Luminosity (11 vs 0 × Sun), while Barnard's Star has a higher Apparent Magnitude (10 vs 1 mag), while Barnard's Star has a higher Color Index (B-V) (2 vs 0).
Brightness
1
Apparent Magnitude
10
2
Absolute Magnitude
13
11
Luminosity
0
Physical Properties
17
Distance
6
8,004
Surface Temperature
3,691
0
Color Index (B-V)
2
Position
20
Right Ascension
18
9
Declination
5
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Data sourced from HYG Database (Free for any purpose, including commercial).