ProcyonvsThuban
Procyon has a higher Absolute Magnitude (3 vs -1 mag), while Procyon has a higher Color Index (B-V) (0 vs 0), while Thuban has a higher Luminosity (256 vs 7 × Sun).
Brightness
0
Apparent Magnitude
4
3
Absolute Magnitude
-1
7
Luminosity
256
Physical Properties
11
Distance
303
6,714
Surface Temperature
10,781
0
Color Index (B-V)
0
Position
8
Right Ascension
14
5
Declination
64
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Data sourced from HYG Database (Free for any purpose, including commercial).