Regulus, also designated as α Leonis (alpha Leonis), is a variable and multiple main-sequence star in the constellation of Leo.
Regulus visual magnitude is 1.35, making it the 21th brightest star in the sky. Thanks to its high brightness, Regulus is clearly visible when observed from locations with dark skyes, and should be also quite easily visible from light polluted areas.
Here's the graphic of its energy spectrum made with Simbad:
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SCIENTIFIC RESULTS:
In this case, I have only found comparisons of alpha Leonis with other stars. I have not been able to find what elements it has. In these links I have learned more about it, but without its elements.(https://iopscience.iop.org/article/10.1088/0004-637X/732/2/68/pdf ) (https://iopscience.iop.org/article/10.1086/430730/pdf )