AltairvsThuban
Altair has a higher Absolute Magnitude (2 vs -1 mag), while Altair has a higher Color Index (B-V) (0 vs 0), while Thuban has a higher Luminosity (256 vs 11 × Sun).
Brightness
1
Apparent Magnitude
4
2
Absolute Magnitude
-1
11
Luminosity
256
Physical Properties
17
Distance
303
8,004
Surface Temperature
10,781
0
Color Index (B-V)
0
Position
20
Right Ascension
14
9
Declination
64
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Data sourced from HYG Database (Free for any purpose, including commercial).