A small depression known as Aratus CA on the Moon, in <a href="https://en.wikipedia.org/wiki/Mare_Serenitatis" class="extiw" title="en:Mare Serenitatis">Mare Serenitatis</a>. Probably, it has volcanic origin (<a rel="nofollow" class="external text" href="https://web.archive.org/web/20180531035614/http://lroc.sese.asu.edu/posts/24">Braden, 2009</a>). A wrinkle ridge running upwards is Dorsum Owen. Photo by <a href="https://en.wikipedia.org/wiki/Apollo_15" class="extiw" title="en:Apollo 15">Apollo 15</a>, taken 31 July 1971 from altitude 104 km. Width of the photo is 15 km, north is approximately up. See also images <a rel="nofollow" class="external text" href="http://wms.lroc.asu.edu/apollo/view?camera=P&amp;image_name=AS15-P-9355">AS15-P-9355</a> and <a rel="nofollow" class="external text" href="http://wms.lroc.asu.edu/apollo/view?camera=P&amp;image_name=AS15-P-9353">AS15-P-9353</a> with higher resolution.
NASA
1971-07-31
part of image <a rel="nofollow" class="external text" href="http://wms.lroc.asu.edu/apollo/view?camera=M&amp;image_name=AS15-M-0580">AS15-M-0580</a> by Apollo 15