AtlasvsCastor
Castor has a higher Color Index (B-V) (0 vs 0), while Castor has a higher Absolute Magnitude (1 vs -2 mag), while Atlas has a higher Luminosity (427 vs 49 × Sun).
Brightness
4
Apparent Magnitude
2
-2
Absolute Magnitude
1
427
Luminosity
49
Physical Properties
382
Distance
51
11,092
Surface Temperature
9,720
0
Color Index (B-V)
0
Position
4
Right Ascension
8
24
Declination
32
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Data sourced from HYG Database (Free for any purpose, including commercial).