Grey metallic like in color, circular in shape, my iPhone caught the object. Not in pictures right before or after it.

I was walking on a PSEG bike trail that runs behind my home on October 21st 2021. I reached an area where there is a large pond. I walked up to the ponds edge a began to take 3 quick pictures of the beautiful trees with there fall foliage.  At that point I walked back home.  The next morning while drinking coffee, I began looking at the pictures I had taken.  I expanded the pictures to get a better view of the trees and something in the upper right area of the second picture caught my eye.  I never saw this with the naked eye.  I couldn’t believe it as I expanded the picture.  I thought you may be interested.  I would also like to mention that both the 1st photo and 3rd photo do not show this object.  When I took these pictures with my iPhone 11, it’s was a quick click, click, click.  That’s why I said duration was 3 seconds.