AlphardvsRed Rectangle
Red Rectangle has a higher Absolute Magnitude (1 vs -2 mag), while Alphard has a higher Luminosity (426 vs 49 × Sun), while Red Rectangle has a higher Distance (1,437 vs 180 light-years).
Brightness
2
Apparent Magnitude
9
-2
Absolute Magnitude
1
426
Luminosity
49
Physical Properties
180
Distance
1,437
3,886
Surface Temperature
7,193
1
Color Index (B-V)
0
Position
9
Right Ascension
6
-9
Declination
-11
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Data sourced from HYG Database (Free for any purpose, including commercial).