The UFO is between two tall canyon walls, hidden there for a long time, since we can clearly see two areas on each side where landslides took place on the front top of the UFO.
http://www.planetary.org/multimedia/space-images/small-bodies/mascot-landing-site-terrain.html
All videos, photos, words I say are free to use on your own UFO sites, news sites, magazines, newspapers and so on. Permission granted. SCW
Similar UFO on moon: http://www.ufosightingsdaily.com/2013/09/giant-ufo-mothership-discovered-on.html