Starship Asterisk*

The degree of 'left/right' symetry is amazing ! So much so, I wonder if it's absolutely certain it's real, or could it be an unusual optical reflection effect of kinds? Is a physical process known that could produce almost perfect 'mirroring' such as seen here ? Different than, but in a sense compar...

I have reviewed all the comments, still can't seem to find an definite hint of how long a typical nova such as this is supposed to stay extra-bright : days? weeks ? more ?

TIA

How long does a 'nova' event of the assumed type last ?