CastorvsTegmine
Tegmine has a higher Color Index (B-V) (1 vs 0), while Castor has a higher Luminosity (49 vs 7 × Sun), while Tegmine has a higher Absolute Magnitude (3 vs 1 mag).
Brightness
2
Apparent Magnitude
5
1
Absolute Magnitude
3
49
Luminosity
7
Physical Properties
51
Distance
82
9,720
Surface Temperature
6,252
0
Color Index (B-V)
1
Position
8
Right Ascension
8
32
Declination
18
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Data sourced from HYG Database (Free for any purpose, including commercial).