There is no known star called "Sheraton". It is possible that you are thinking of a different name, or perhaps a fictional star from a book or movie.

To find the luminosity of a star, you would need to know its:

* Spectral type: This tells us the star's temperature and color.

* Absolute magnitude: This is a measure of the star's intrinsic brightness.

Once you have these values, you can use a formula or online calculator to determine the star's luminosity.

If you could provide more information about the star you are looking for, I might be able to help you find its luminosity.