ИСТИНА

A technique has been developed for the automated creation of morphometric catalogs of lunar craters on the basis of a digital elevation model constructed from altimetry data from the Lunar Reconnaissance Orbiter spacecraft. Morphometric catalogs of craters with a diameter of 10 km and more have been created for the northern and southern polar regions, limited by latitudes +/- 60 °. The catalogs define: coordinates of craters, diameters, angles of inclination of inner and outer slopes, maximum and minimum heights of the bottom and crests of ramparts, depths and depth-to-diameter ratios. In the northern polar region, 2,302 craters were found, in the southern one, 1,323 craters, and in the northern hemisphere there were more craters with a diameter of 10 to 30 km (almost twice). In the southern polar region, on average, the inner slopes turned out to be steeper than in the northern region. The age of the surfaces of the northern and southern polar regions, formed 4.3 billion years ago, was determined. The height differences of the crests of the crater ramparts increase with the increase in the crater diameters.