Castor BvsUruk
Uruk has a higher Distance (386 vs 52 light-years), while Castor B has a higher Luminosity (16 vs 3 × Sun), while Uruk has a higher Apparent Magnitude (9 vs 3 mag).
Brightness
3
Apparent Magnitude
9
2
Absolute Magnitude
4
16
Luminosity
3
Physical Properties
52
Distance
386
N/A
Surface Temperature
6,217
N/A
Color Index (B-V)
1
Position
8
Right Ascension
20
32
Declination
16
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Data sourced from HYG Database (Free for any purpose, including commercial).