None of the above. And it isn’t a UFO, either.
I took this photo an hour or two after sunrise. The sun is quite a way to the left of this image. What’s happened is that sunlight has been reflected and refracted within the ice crystals of the high level cirrus cloud, producing a blindingly white object with a halo of colour.
No wonder primitive people were superstitious.
Feel free to copy – provided you recognise my copyright and attribute the photo to me.