AltairvsFafnir
Altair has a higher Absolute Magnitude (2 vs 0 mag), while Fafnir has a higher Distance (315 vs 17 light-years), while Fafnir has a higher Luminosity (96 vs 11 × Sun).
Brightness
1
Apparent Magnitude
5
2
Absolute Magnitude
0
11
Luminosity
96
Physical Properties
17
Distance
315
8,004
Surface Temperature
4,350
0
Color Index (B-V)
1
Position
20
Right Ascension
18
9
Declination
66
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Data sourced from HYG Database (Free for any purpose, including commercial).