AltairvsPropus
Altair has a higher Absolute Magnitude (2 vs -2 mag), while Propus has a higher Luminosity (574 vs 11 × Sun), while Propus has a higher Distance (385 vs 17 light-years).
Brightness
1
Apparent Magnitude
3
2
Absolute Magnitude
-2
11
Luminosity
574
Physical Properties
17
Distance
385
8,004
Surface Temperature
3,649
0
Color Index (B-V)
2
Position
20
Right Ascension
6
9
Declination
23
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Data sourced from HYG Database (Free for any purpose, including commercial).