<a href="https://en.wikipedia.org/wiki/Mons_R%C3%BCmker" class="extiw" title="en:Mons Rümker">Mons Rümker</a> on the Moon.<br><i>Original description:</i> Mons Rümker (40.8°N, 302.01°E) at dawn, means the Moon was nearly Full the night of December 28-29, 2009. The 72 km-wide volcanic heap lords it over the north-northwest Oceanus Procellarum and is never seen except in profile from Earth. Mosaic (by Microsoft ICE) from four LROC Wide Angle Camera observations (processed using LROC WAC Previewer v.1.6) over LRO orbits 2329-2332; avg. alt. 46.59 km., avg. res. 65.53 m, avg. LRO/Moon/Sun phase angle = 89.07°
NASA (mosaic of photos by LRO)
<a href="//commons.wikimedia.org/wiki/File:Mons_R%C3%BCmker.jpg" title="File:Mons Rümker.jpg">File:Mons Rümker.jpg</a><br>primary sources: LRO images <a rel="nofollow" class="external text" href="http://wms.lroc.asu.edu/lroc/view_lroc/LRO-L-LROC-3-CDR-V1.0/M116696225MC">M116696225MC</a> (center), <a rel="nofollow" class="external text" href="http://wms.lroc.asu.edu/lroc/view_lroc/LRO-L-LROC-3-CDR-V1.0/M116702993MC">M116702993MC</a> (left), <a rel="nofollow" class="external text" href="http://wms.lroc.asu.edu/lroc/view_lroc/LRO-L-LROC-3-CDR-V1.0/M116689430MC">M116689430MC</a> (right)