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This distance I found of 45.61 Mly falls well within commonly accepted professional distances to NGC 7331. On the general information page for NGC 7331, the European Space Agency cites a value of 45 Mly. The LEDA Galaxy Catalog, a professional catalog of thousands of galaxies, cites a distance to NGC 7331 of 47.36 +/- 0.65 Mly. With a value of 45.61 Mly, it is clear that amateurs are capable of accurately calculating galactic distances using Type Ia Supernovae.Â