AltairvsMirach
Altair has a higher Absolute Magnitude (2 vs -2 mag), while Mirach has a higher Luminosity (474 vs 11 × Sun), while Altair has a higher Right Ascension (20 vs 1 h).
Brightness
1
Apparent Magnitude
2
2
Absolute Magnitude
-2
11
Luminosity
474
Physical Properties
17
Distance
197
8,004
Surface Temperature
3,683
0
Color Index (B-V)
2
Position
20
Right Ascension
1
9
Declination
36
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Data sourced from HYG Database (Free for any purpose, including commercial).