MegrezvsTarf
Megrez has a higher Absolute Magnitude (1 vs -1 mag), while Tarf has a higher Color Index (B-V) (1 vs 0), while Tarf has a higher Luminosity (292 vs 25 × Sun).
Brightness
3
Apparent Magnitude
4
1
Absolute Magnitude
-1
25
Luminosity
292
Physical Properties
81
Distance
303
9,256
Surface Temperature
3,822
0
Color Index (B-V)
1
Position
12
Right Ascension
8
57
Declination
9
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Data sourced from HYG Database (Free for any purpose, including commercial).