It is a version of <a href="//commons.wikimedia.org/wiki/File:Concentric_crater_in_Minkowski.png" title="File:Concentric crater in Minkowski.png">file:Concentric crater in Minkowski.png</a> with cropped edges and increased contrast. Width is 19 km.
NASA
2012-11-06
Image <a rel="nofollow" class="external text" href="http://wms.lroc.asu.edu/lroc/view_lroc/LRO-L-LROC-2-EDR-V1.0/M1106875712CE">M1106875712CE</a> by <a href="https://en.wikipedia.org/wiki/Lunar_Reconnaissance_Orbiter" class="extiw" title="en:Lunar Reconnaissance Orbiter">Lunar Reconnaissance Orbiter</a>, processed with LROC WAC Previewer (v1.6.1). 6th band (wavelength 643 nm) was used; "vertical travel" parameter was set to 8px. Brightness and contrast were increased.