AchernarvsAlcor
Alcor has a higher Declination (55 vs -57 °), while Alcor has a higher Color Index (B-V) (0 vs 0), while Alcor has a higher Absolute Magnitude (2 vs -3 mag).
Brightness
0
Apparent Magnitude
4
-3
Absolute Magnitude
2
1,052
Luminosity
14
Physical Properties
139
Distance
82
12,650
Surface Temperature
8,411
0
Color Index (B-V)
0
Position
2
Right Ascension
13
-57
Declination
55
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Data sourced from HYG Database (Free for any purpose, including commercial).