I was sitting in my backyard having a smoke. I looked to the south east and I saw what looked like a high flying jet leaving a vapor trail about 35 degrees altitude, 150deg. southeast.Measured by my iphone. I got my binoculars and followed it and it looked like a circle with delta shape behind it.It was slowly moving down to the horizon. It left NO trail,but retained it's shape the whole time. It changed color from yellow to bright orange about 25 deg. from horizon. It moved slowly. I do not think it was in our atmosphere as it left no trail. It looked to me as if it were in earth orbit.If that is the case, then it was very large.I thought it may have been a rocket launch from Vandenberg AFB, but I have seen those before and it was not that.This looked like a shape I reported two years ago, but this one was much farther away and larger and different color.I did not have time to get a picture and I think it would not have come out anyway. This was close to the sun. The object was 35deg above the horizon and the sun was close to it ,but the object was going away from the sun. It disappeared from view and I came in to report right away. I can send a drawing.