Castor BvsNembus
Castor B has a higher Absolute Magnitude (2 vs 0 mag), while Nembus has a higher Luminosity (94 vs 16 × Sun), while Castor B has a higher Right Ascension (8 vs 2 h).
Brightness
3
Apparent Magnitude
4
2
Absolute Magnitude
0
16
Luminosity
94
Physical Properties
52
Distance
177
N/A
Surface Temperature
4,167
N/A
Color Index (B-V)
1
Position
8
Right Ascension
2
32
Declination
49
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Data sourced from HYG Database (Free for any purpose, including commercial).