AlsephinavsCastor B
Castor B has a higher Declination (32 vs -55 °), while Castor B has a higher Absolute Magnitude (2 vs 0 mag), while Alsephina has a higher Luminosity (90 vs 16 × Sun).
Brightness
2
Apparent Magnitude
3
0
Absolute Magnitude
2
90
Luminosity
16
Physical Properties
81
Distance
52
9,619
Surface Temperature
N/A
0
Color Index (B-V)
N/A
Position
9
Right Ascension
8
-55
Declination
32
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Data sourced from HYG Database (Free for any purpose, including commercial).