AlcorvsDiadem
Alcor has a higher Declination (55 vs 18 °), while Diadem has a higher Color Index (B-V) (0 vs 0), while Alcor has a higher Luminosity (14 vs 5 × Sun).
Brightness
4
Apparent Magnitude
4
2
Absolute Magnitude
3
14
Luminosity
5
Physical Properties
82
Distance
58
8,411
Surface Temperature
6,600
0
Color Index (B-V)
0
Position
13
Right Ascension
13
55
Declination
18
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Data sourced from HYG Database (Free for any purpose, including commercial).