These are the discovery images of 2012 VP113, affectionately called 'Biden' because of the VP in the provisional name.
It has the most distant orbit known in our Solar System. Three images of the night sky, each taken about two hours apart, were combined into one. The first image was artificially colored red, second green and third blue. 2012 VP113 moved between each image as seen by the red, green and blue dots. The background stars and galaxies did not move and thus their red, green and blue images combine to showup as white sources.