Please, See link Nasa, to understand the white spot and shadow.
http://www.nasa.gov/mission_pages/LRO/multimedia/lroimages/lola-20100520-lunarswirl.html
Taken with afocal method and ISO 400. Picture enlarged and cutting. Date: 09-20-2014 Hour: 05:27 (09:57 UTC). Equipment: Telescope reflector aperture 114mm (4.5"), focal length 900mm and eyepiece (1.25") 17mm. Digital camera 10 megapixels and optical zoom 5X. Location: Cagua, State Aragua Venezuela (N 10° 11' 24.00" W 67° 27' 36.00").