AlkaphrahvsYildun
Yildun has a higher Absolute Magnitude (1 vs -2 mag), while Alkaphrah has a higher Luminosity (393 vs 44 × Sun), while Yildun has a higher Color Index (B-V) (0 vs 0).
Brightness
4
Apparent Magnitude
4
-2
Absolute Magnitude
1
393
Luminosity
44
Physical Properties
358
Distance
172
10,039
Surface Temperature
9,871
0
Color Index (B-V)
0
Position
9
Right Ascension
18
47
Declination
87
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Data sourced from HYG Database (Free for any purpose, including commercial).