The distance calculated from the nebular expansion rate is 3.35 kpc and the resulting luminosity of 150,000 times the sun ( L ) is much lower than previously calculated .
3.35 kpc is less than previous studies .
The distance calculated from the nebular expansion rate is 3.35 kpc , which is less than previous studies , and the resulting luminosity of 150,000 times the sun ( L ) is much lower than previously calculated .