Adjacent Barocius also has a similar feature, but more distinct -- it probably was a later impact. But from the look of it, not much later than the major hit. Possibly even a one-two punch. A bit north, Gemma Frisius was also putting on a good show, but considerably less well lit. This afforded a fleeting glance at its curious "squarish" internal craters. There are two similar features, one north and one south. The northern one looks almost perfectly square, with a single distended corner. The southern one looks more like a trapezoid, and a smaller crater next to it also has a curious angular appearance. I have seen this effect before, particularly the crater South near Mare Frigoris, but it usually can be traced to nearby older impacts that deform the walls in this way. But these craters show no such obvious mechanism, and I have no idea why three such are so proximal.
See also Morio Higashida's image of Maurolycus.
|Moon-Lite Atlas for chart 66|