This image shows two small craters, just touching on their rims, in the much larger Ptolmaeus Crater, which is located in the Martian Southern Hemisphere. These craters are called “tangential craters.”

The more degraded and filled-in crater is approximately 3 kilometers in diameter, and there is an unusual feature near the center. A closeup shows up the feature is approximately 76 meters wide and 164 meters long. This feature is also possibly a substantially oblique impact crater, but its origin remains unknown.

ID: ESP_020065_1335
date: 6 November 2010
altitude: 252 km

https://uahirise.org/hipod/ESP_020065_1335
NASA/JPL-Caltech/University of Arizona
#Mars #science #NASA