AlcorvsErrai
Errai has a higher Color Index (B-V) (1 vs 0), while Alcor has a higher Surface Temperature (8,411 vs 4,670 K), while Alcor has a higher Distance (82 vs 46 light-years).
Brightness
4
Apparent Magnitude
3
2
Absolute Magnitude
2
14
Luminosity
9
Physical Properties
82
Distance
46
8,411
Surface Temperature
4,670
0
Color Index (B-V)
1
Position
13
Right Ascension
24
55
Declination
78
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Data sourced from HYG Database (Free for any purpose, including commercial).