I had the Q64018 today, Connellsville to New castle. We had 2 brand new UP engines. They were UP 5675 and UP 5673, both 12 days old. I saw quite a few photographers along the way.
Perhaps somebody posted a picture of your train on RailPictures.net
I believe you can look by CSX, the date, location and also possibly the train symbol.
http://www.railpictures.net