Red RectanglevsZhang
Red Rectangle has a higher Absolute Magnitude (1 vs 0 mag), while Red Rectangle has a higher Distance (1,437 vs 264 light-years), while Zhang has a higher Color Index (B-V) (1 vs 0).
Brightness
9
Apparent Magnitude
4
1
Absolute Magnitude
0
49
Luminosity
129
Physical Properties
1,437
Distance
264
7,193
Surface Temperature
4,949
0
Color Index (B-V)
1
Position
6
Right Ascension
10
-11
Declination
-15
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Data sourced from HYG Database (Free for any purpose, including commercial).