CastorvsGrumium
Grumium has a higher Color Index (B-V) (1 vs 0), while Grumium has a higher Right Ascension (18 vs 8 h), while Grumium has a higher Apparent Magnitude (4 vs 2 mag).
Brightness
2
Apparent Magnitude
4
1
Absolute Magnitude
1
49
Luminosity
33
Physical Properties
51
Distance
113
9,720
Surface Temperature
4,354
0
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).