e/Ptolemaeus (Martian crater)

Information
has gloss	eng: Ptolemaeus Crater is a crater on Mars found in the Phaethontis quadrangle at 46.2° south latitude and 157.6° west longitude. It is 185.0 km in diameter and was named after Claudius Ptolemaeus, a Greco-Egyptian astronomer (c. A.D. 90-160). Ice-rich mantle Much of the surface of Mars is covered by a thick smooth mantle that is thought to be a mixture of ice and dust. This ice-rich mantle, a few yards thick, smoothes the land, but in places it has a bumpy texture, resembling the surface of a basketball. Under certain conditions the ice could melt and flow down the slopes to create gullies. Because there are few craters on this mantle, the mantle is relatively young. An excellent view of this mantle is shown below in the picture of the Ptolemaeus Crater Rim, as seen by HiRISE.
lexicalization	eng: Ptolemaeus
instance of	e/List of craters on Mars