This animation, made from images taken by the Advanced Moon Imaging Experiment (AMIE) on board ESA’s SMART-1 spacecraft, shows a feature characterized by bright albedo, and called Reiner Gamma Formation.
The Reiner Gamma Formation, a totally flat area consisting of much brighter material than the surrounding dark 'mare', is centred on an area located at 57.8° West, 8.1° North, in the Oceanus Procellarum on the near (visible) side of the Moon, and has an extension of approximately 30 by 60 kilometres. The feature was initially misinterpreted as a crater. Later observations from orbit have shown that the observed swirl-like patterns do not correspond to any topographic features, but they are the result of an optical anomaly whose origin is still unclear.
The AMIE camera obtained the images on 14 January 2006, from a distance between 1599 and 1688 kilometres and with a ground resolution between 144 and 153 metres per pixel.