DiademvsPhact
Diadem has a higher Absolute Magnitude (3 vs -2 mag), while Diadem has a higher Declination (18 vs -34 °), while Diadem has a higher Color Index (B-V) (0 vs 0).
Brightness
4
Apparent Magnitude
3
3
Absolute Magnitude
-2
5
Luminosity
487
Physical Properties
58
Distance
261
6,600
Surface Temperature
11,920
0
Color Index (B-V)
0
Position
13
Right Ascension
6
18
Declination
-34
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Data sourced from HYG Database (Free for any purpose, including commercial).