CastorvsChalawan
Castor has a higher Luminosity (49 vs 2 × Sun), while Chalawan has a higher Color Index (B-V) (1 vs 0), while Chalawan has a higher Absolute Magnitude (4 vs 1 mag).
Brightness
2
Apparent Magnitude
5
1
Absolute Magnitude
4
49
Luminosity
2
Physical Properties
51
Distance
46
9,720
Surface Temperature
5,875
0
Color Index (B-V)
1
Position
8
Right Ascension
11
32
Declination
40
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Data sourced from HYG Database (Free for any purpose, including commercial).