DiademvsPhecda
Phecda has a higher Luminosity (62 vs 5 × Sun), while Diadem has a higher Color Index (B-V) (0 vs 0), while Diadem has a higher Absolute Magnitude (3 vs 0 mag).
Brightness
4
Apparent Magnitude
2
3
Absolute Magnitude
0
5
Luminosity
62
Physical Properties
58
Distance
83
6,600
Surface Temperature
9,608
0
Color Index (B-V)
0
Position
13
Right Ascension
12
18
Declination
54
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Data sourced from HYG Database (Free for any purpose, including commercial).