DiademvsScheat
Diadem has a higher Absolute Magnitude (3 vs -1 mag), while Scheat has a higher Luminosity (332 vs 5 × Sun), while Scheat has a higher Color Index (B-V) (2 vs 0).
Brightness
4
Apparent Magnitude
2
3
Absolute Magnitude
-1
5
Luminosity
332
Physical Properties
58
Distance
196
6,600
Surface Temperature
3,574
0
Color Index (B-V)
2
Position
13
Right Ascension
23
18
Declination
28
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Data sourced from HYG Database (Free for any purpose, including commercial).