Atget crater is distinctive on 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 surface due to its dark color. Atget crater is located within 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...

, near Apollodorus

Apollodorus (crater)

Apollodorus is an impact crater on Mercury. It is located near the center of Pantheon Fossae, which is a system of radial grabens situated in the inner part of the Caloris basin...

 crater and Pantheon Fossae

Pantheon Fossae

Pantheon Fossae is a region in the center of Caloris Basin on Mercury containing numerous radial graben that appear to be extensional faults, with a 40 km crater located near the center of the pattern. The exact cause of this pattern of troughs is not currently known...

. The dark color of the floor of Atget is in contrast to other craters within Caloris basin that exhibit bright materials on their floors, such as the craters Kertész

Kertész (crater)

Located in the western edge of Mercury's giant Caloris basin, Kertész crater has some unusual, bright material located on its floor. Sander crater, located in the northwestern edge of Caloris basin, also shows bright material on its floor...

 and 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 ....

. Other craters on Mercury, such as Basho

Basho (crater)

Basho is a crater on Mercury. Though Basho crater is only about in diameter, its bright rays make it an easily identified feature on Mercury's surface. In addition to the long bright rays, photographs from Mariner 10 showed an intriguing dark halo of material around the crater....

 and Neruda, have halos of dark material but the dark material does not cover the crater floors.