DiademvsMarkab
Diadem has a higher Absolute Magnitude (3 vs -1 mag), while Diadem has a higher Color Index (B-V) (0 vs 0), while Markab has a higher Luminosity (147 vs 5 × Sun).
Brightness
4
Apparent Magnitude
2
3
Absolute Magnitude
-1
5
Luminosity
147
Physical Properties
58
Distance
133
6,600
Surface Temperature
10,150
0
Color Index (B-V)
0
Position
13
Right Ascension
23
18
Declination
15
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Data sourced from HYG Database (Free for any purpose, including commercial).