Lunar pit (collapsed roof of some subsurface cavity, probably, a lava tube) in <a href="https://en.wikipedia.org/wiki/Mare_Fecunditatis" class="extiw" title="en:Mare Fecunditatis">Mare Fecunditatis</a> (0.917°S, 48.660°E). See <a rel="nofollow" class="external text" href="http://adsabs.harvard.edu/abs/2014Icar..237...52W">Wagner, Robinson, 2014</a> and <a rel="nofollow" class="external text" href="https://web.archive.org/web/20180809121035/http://lroc.sese.asu.edu/posts/802">Stopar, 2014</a>. Photo by <a href="https://en.wikipedia.org/wiki/Lunar_Reconnaissance_Orbiter" class="extiw" title="en:Lunar Reconnaissance Orbiter">Lunar Reconnaissance Orbiter</a>, taken with Narrow Angle Camera (NAC) 21 September 2015 from altitude 90 km. Sun elevation is 55.1°. Width of the image is 500×500 m, north is approximately up. <a rel="nofollow" class="external text" href="http://target.lroc.asu.edu/fcgi-bin/fprovweb.exe?_xtype=text%2Fhtml&amp;lat=-0.917&amp;lon=48.66&amp;cmd=include+%22lroc_test_extract_data_at_ll.msh%22">Full collection of its photos by this camera</a>.
NASA
2015-09-21
<a href="https://en.wikipedia.org/wiki/Lunar_Reconnaissance_Orbiter" class="extiw" title="en:Lunar Reconnaissance Orbiter">Lunar Reconnaissance Orbiter</a> image <a rel="nofollow" class="external text" href="http://wms.lroc.asu.edu/lroc/view_lroc/LRO-L-LROC-3-CDR-V1.0/M1197457075RC">M1197457075RC</a>