Hokusai quadrangle

Named after the Hokusai crater, it was mapped in detail for the first time after MESSENGER entered orbit around Mercury in 2011.

It had not been mapped prior to that point because it was one of the six quadrangles that was not illuminated when Mariner 10 made its flybys in 1974 and 1975.

[1][2] Prominent features within Hokusai quadrangle, other than Hokusai itself, include the large peak ring crater Rachmaninoff and the somewhat smaller crater Rustaveli.

[3] A similar (unnamed) feature without bright coloration is northeast of the crater Hodgkins, informally named the butterfly vent.

[4] Much of the quadrangle is covered by the smooth plains of the Borealis Planitia.