“Was preparing to take star trail images. Snapped off a few stills to check the exposure settings Then went ahead and took a series of star trail images. When going through the images this morning I came across something that I cannot identify.
Just to make to clear I did not see this with my naked eye or even notice it was there. In following image taken shortly after the "UFO" image does not show anything. So it was gone quickly.
Camera was on tripod and pointing due east in my backyard.”