Located in the western edge of Mercury

Mercury (planet)

Mercury is the innermost and smallest planet in the Solar System, orbiting the Sun once every 87.969 Earth days. The orbit of Mercury has the highest eccentricity of all the Solar System planets, and it has the smallest axial tilt. It completes three rotations about its axis for every two orbits...

's giant Caloris basin

Caloris Basin

The Caloris Basin, also called Caloris Planitia, is a large impact crater on Mercury about in diameter, one of the largest impact basins in the solar system. Caloris is Latin for heat and the basin is so-named because the Sun is almost directly overhead every second time Mercury passes perihelion...

, Kertész crater

Impact crater

In the broadest sense, the term impact crater can be applied to any depression, natural or manmade, resulting from the high velocity impact of a projectile with a larger body...

 (named in 2008 for André Kertész

André Kertész

André Kertész , born Kertész Andor, was a Hungarian-born photographer known for his groundbreaking contributions to photographic composition and the photo essay. In the early years of his career, his then-unorthodox camera angles and style prevented his work from gaining wider recognition...

, a Hungarian-born American photographer) has some unusual, bright material located on its floor. Sander

Sander (crater)

Sander is a crater on Mercury, within Caloris Basin. It has dark walls and bright patches on its floor. Unlike the rays of Basho crater, the bright areas are not believed to be immature but are inherently bright. It is named after the German photographer August Sander ....

crater, located in the northwestern edge of Caloris basin, also shows bright material on its floor. Just northeast of Kertész a small crater has very bright rays and ejecta, indicating that the crater is young.