How old is the 2011fe supernova?

I cant see it because of light pollution and my telescope sucks but I am curious about its age.

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  • 9 years ago
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    It was first identified on August 24 from pictures take one and two day before, so from the point of view of how recent it is observable, that would be 17 days or so.

    But since it is located in a galaxy 21 million light years away, that makes it 21 million years old.

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