AlterfvsEltanin
Eltanin has a higher Declination (51 vs 23 °), while Alterf has a higher Distance (329 vs 154 light-years), while Alterf has a higher Apparent Magnitude (4 vs 2 mag).
Brightness
4
Apparent Magnitude
2
-1
Absolute Magnitude
-1
166
Luminosity
248
Physical Properties
329
Distance
154
3,733
Surface Temperature
3,762
2
Color Index (B-V)
2
Position
10
Right Ascension
18
23
Declination
51
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Data sourced from HYG Database (Free for any purpose, including commercial).