Geological Chronicle
Situated on the far side of the Moon northeast of Langemak, Necho is a Copernican-period crater measuring 36.87 kilometers in diameter. A prominent system of rays surrounds the rim, forming a high-albedo skirt of ejecta that extends continuously for several crater diameters to the north and northeast before thinning into occasional wisps.
The outer rim is uneven, particularly along the western side where overlapping walls produce an almost spiral pattern. Because the inner side is wider on the west, the interior floor is offset to the eastern half, where infrared observations identified pure crystalline plagioclase amid rough ground and several hills.
The crater was informally called 'the Bright One' by the Apollo 14 crew. The International Astronomical Union formally adopted the name Necho in 1976, after Necho II, the king of the Egyptian 26th Dynasty.