AlcorvsEltanin
Alcor has a higher Absolute Magnitude (2 vs -1 mag), while Eltanin has a higher Luminosity (248 vs 14 × Sun), while Eltanin has a higher Color Index (B-V) (2 vs 0).
Brightness
4
Apparent Magnitude
2
2
Absolute Magnitude
-1
14
Luminosity
248
Physical Properties
82
Distance
154
8,411
Surface Temperature
3,762
0
Color Index (B-V)
2
Position
13
Right Ascension
18
55
Declination
51
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Data sourced from HYG Database (Free for any purpose, including commercial).