CastorvsSirius
Castor has a higher Apparent Magnitude (2 vs -1 mag), while Castor has a higher Declination (32 vs -17 °), while Castor has a higher Distance (51 vs 9 light-years).
Brightness
2
Apparent Magnitude
-1
1
Absolute Magnitude
1
49
Luminosity
23
Physical Properties
51
Distance
9
9,720
Surface Temperature
10,014
0
Color Index (B-V)
0
Position
8
Right Ascension
7
32
Declination
-17
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Data sourced from HYG Database (Free for any purpose, including commercial).