I came across these photos today. This one is Asteroid Lutetia and Saturn. At a distance of 36,000 kilometers (22,369 miles) the OSIRIS Narrow Angle Camera (NAC) took this image of Lutetia, catching the planet Saturn in the background.
See the rest here http://www.theatlantic.com/infocus/2014/09/rosettas-amazing-10-year-space-journey/100812/