On Friday August 19th about 12:10 in the afternoon, while spotting airplanes via my binoculars, (I hobby watching aircraft utilizing Flight Radar 24) I was watching a Delta flight flying from Northeast direction when just above it a stationary object, perfectly round and golf ball like, caught my attention. Thinking of course it was just another aircraft I checked my iPad radar and it was not on it. I looked again and realized it really was just hovering high in the air. Going from the altitude of the Delta flight I ascertain the object to have been 40,000 or more feet up. The object then started to slowly drift to the Sourheast in the same contrail direction of the Delta, and then it abruptly shot to its upper left direction and subsequently vanished. The entire episode was little under a minute, but it s something I'll never forget. I can only say that in the purest sense of the acronym, this object truly was, for me at least, an unidentifiable object.