CastorvsTupi
Castor has a higher Declination (32 vs -53 °), while Castor has a higher Luminosity (49 vs 1 × Sun), while Tupi has a higher Color Index (B-V) (1 vs 0).
Brightness
2
Apparent Magnitude
7
1
Absolute Magnitude
4
49
Luminosity
1
Physical Properties
51
Distance
111
9,720
Surface Temperature
6,035
0
Color Index (B-V)
1
Position
8
Right Ascension
4
32
Declination
-53
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Data sourced from HYG Database (Free for any purpose, including commercial).