The total exposure time between 2009 and 2021 is around 1,250 hours. (To load the full image in its 11.5 MB glory, click here.)
It is amazing to load the entire image and look at detail using the magnifying glass.
Sort of scary when you grasp the distances involved, our nearest neighboring star is only 4.5 light years away if we could triple our current fastest speed, around 40,000 mph it would only take around 55,000 years to get there...