CastulavsDiadem
Diadem has a higher Right Ascension (13 vs 1 h), while Castula has a higher Luminosity (46 vs 5 × Sun), while Diadem has a higher Absolute Magnitude (3 vs 1 mag).
Brightness
5
Apparent Magnitude
4
1
Absolute Magnitude
3
46
Luminosity
5
Physical Properties
200
Distance
58
4,848
Surface Temperature
6,600
1
Color Index (B-V)
0
Position
1
Right Ascension
13
59
Declination
18
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Data sourced from HYG Database (Free for any purpose, including commercial).