Castor BvsGrumium
Grumium has a higher Right Ascension (18 vs 8 h), while Grumium has a higher Distance (113 vs 52 light-years), while Grumium has a higher Luminosity (33 vs 16 × Sun).
Brightness
3
Apparent Magnitude
4
2
Absolute Magnitude
1
16
Luminosity
33
Physical Properties
52
Distance
113
N/A
Surface Temperature
4,354
N/A
Color Index (B-V)
1
Position
8
Right Ascension
18
32
Declination
57
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Data sourced from HYG Database (Free for any purpose, including commercial).