BrachiumvsCastor
Castor has a higher Declination (32 vs -25 °), while Castor has a higher Absolute Magnitude (1 vs -1 mag), while Brachium has a higher Color Index (B-V) (2 vs 0).
Brightness
3
Apparent Magnitude
2
-1
Absolute Magnitude
1
341
Luminosity
49
Physical Properties
288
Distance
51
3,549
Surface Temperature
9,720
2
Color Index (B-V)
0
Position
15
Right Ascension
8
-25
Declination
32
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Data sourced from HYG Database (Free for any purpose, including commercial).