Fascinating and thanks for the link. What is the velocity of the UFO? Has it been captured by the Solar System or doomed to fly far out into outer space? Halley's Comet is potato shaped but this looks like a squashed potato. Over two hundred miles per second then it is doomed to leave the Milky Way never to return.
edit: Katy's Star is also fascinating which some think has a partially completed Dyson Shell. Search Dyson Shell which is intelligent made.