This higher-albedo skirt of ejecta extends in a nearly continuous fashion out for several crater diameters, but is more extensive to the north and northeast than elsewhere.

Beyond this continuous skirt, occasional rays and wisps of light material extend outwards for many more crater diameters.

Due to its prominent rays and generally very fresh appearance, Necho is mapped as part of the Copernican System.

[4] Necho lies at the south edge of an unnamed, highly subdued, 200 km diameter crater which was originally discovered during the Apollo 16 mission and reported by Farouk El-Baz.

[5] By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Necho.