Glowing UFO spotted in night in Colorado

On September 27, 2015, an automobilist was going home in Eckley (Colorado) when he has seen a low bright glowing object in the night sky. What is it?

Witness statement:

I was driving home from Sterling, CO to Eckley, CO, traveling south on the evening of 9/27/15. I am not sure of the time but it was dark out. I noticed a low glowing spherical object to the east of me. It was too low to be a star or planet. It appeared to be following me. It would appear to be closer then farther away. I tried to take a picture with my cell phone when it was the closest but my cell phone was dead. I traveled over 50 miles to my home and it was still there to the east, though smaller and farther away, so I took a picture with my Cannon Camera. There was a full moon out later that night as well, full moon before the eclipse blood moon and I took some pictures of the moon as well. The spherical glowing object was gone when I took pictures of the full moon.

Later when I zoomed in on the glowing object in my photo the perimeter appears odd and seems to emit some distance from the perimeter. There is nothing but white light in the center.