UFO Sighting in Peoria, Arizona on 2016-04-16 21:10:00 - Did not see in person, looked back in old photos and discovered.
Basically, i went out with my father to take night time star pictures. we got there and took a few pictures with me as the foreground and we attempted to get the stars and clouds in the background. we took two pictures, one after the other in a certain spot. they both seemed not too different to me so i never noticed it. over a year later, i look back and notice that there's nothing occurring in the first picture, but in he second there's an obvious glowing object n the top right corner. i don't believe its a star trail because it does not exist in the photo taken seconds before. it's very confusing to me and i tried to think of reasons why it wouldn't be in the first picture. but i couldn't think of anything.