I looked it up, turns out it could be any of those depending on how big it is, how far it is, and what its peak brightness here. [1] does a good job of explaini

I looked it up, turns out it could be any of those depending on how big it is, how far it is, and what its peak brightness here. [1] does a good job of explaining it [1]. http://curious.astro.cornell.edu/physics/85-the-universe/supernovae/general-questions/419-how-long-does-the-supernova-stage-of-a-star-last-intermediate http://curious.astro.cornell.edu/physics/85-the-universe/sup...