WThe Raditladi quadrangle (H-4) is one of fifteen quadrangles on Mercury. It runs from 270 to 180° longitude and 20 to 70° latitude. Named after the Raditladi Basin, 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. These six quadrangles continued to be known by their albedo feature names, with this one known as the Liguria quadrangle.
WAiley is a crater on Mercury. It has a diameter of 21 kilometers. Its name was adopted by the International Astronomical Union (IAU) in on April 24, 2012. Ailey is named for the American dancer and choreographer Alvin Ailey, who lived from 1931 to 1989.
WApollodorus is an impact crater on Mercury. Its unusual appearance, with radiating dark troughs, led to a nickname of "the Spider" by scientists before its official name was decided. Apollodorus is located near the center of Pantheon Fossae, which is a system of radial grabens situated in the inner part of the Caloris basin. The floor, rim and walls of Apollodorus expose a low reflectance material (LRM) excavated during the impact from beneath the light volcanic plains, which cover the central part of the Caloris.
WAtget crater is distinctive on the planet Mercury's surface due to its dark color. Atget crater is located within Caloris basin, near Apollodorus crater and Pantheon Fossae. 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 and Sander. Other craters on Mercury, such as Bashō and Neruda, have halos of dark material but the dark material does not cover the crater floors.
WBalanchine is a crater on the planet Mercury. It possesses a ray system of slightly bluish rays. These rays inspired the name of the crater due to their similarity to the tutu in George Balanchine's Serenade.
WCaloris Planitia is a plain within a large impact basin on Mercury, informally named Caloris, about 1,550 km (960 mi) in diameter. It is one of the largest impact basins in the Solar System. "Calor" is Latin for "heat" and the basin is so-named because the Sun is almost directly overhead every second time Mercury passes perihelion. The crater, discovered in 1974, is surrounded by the Caloris Montes, a ring of mountains approximately 2 km (1.2 mi) tall.
WCunningham is a young crater on the western floor of the Caloris Basin, on Mercury. It is surrounded by a bright ray system.
WDali is a crater on Mercury. It has a diameter of 176 kilometers. Its name was adopted by the International Astronomical Union in 2008. Dali is named for the Spanish painter Salvador Dalí, who lived from 1904 to 1989.
WFonteyn is a crater on Mercury. Its name was adopted by the IAU in 2012, after the English ballet dancer Margot Fonteyn.
WKerouac is a crater on Mercury. Its name was adopted by the International Astronomical Union (IAU) in 2015, after American author and poet Jack Kerouac.
WLocated 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. Just northeast of Kertész a small crater has very bright rays and ejecta, indicating that the crater is young.
WKulthum is a crater on Mercury. It has a diameter of 31 kilometers. Its name was suggested by Molouk Ba-Isa from Saudi Arabia, Swiss individual Riana Rakotoarimanana, and American residents Yehya Hassouna, David Suttles, Thorayya Said Giovannelli and Matt Giovannelli in a naming contest which was eventually adopted by the International Astronomical Union (IAU) on 2015. Kulthum is named for the Egyptian singer Umm Kulthum.
WMunch is a crater on Mercury. It was discovered on the first flyby of Mercury by the MESSENGER spacecraft on 14 January, 2008, and was named after Edvard Munch a norwegian painter, printmaker, and draftsman (1863-1944) by the IAU in November of the same year.
WMunkácsy is a crater on Mercury. Munkácsy originally had a double-ring basin structure, but most of the inner ring was buried when the basin was flooded with volcanic lava. Only a few remnants of the ring poke up through the lava, although low ridges in the lava seem to trace out much of the rest of the ring’s circumference.
WNavoi is a crater on Mercury. It contains uncommon reddish material that indicates a different rock composition from its surroundings. Navoi also appears to have an irregularly shaped depression in its center. Such depressions have been seen elsewhere on Mercury, including within Praxiteles crater, and may indicate past volcanic activity.
WNāwahī is a crater on Mercury. Nawahi crater is located within the large Caloris basin. The unusual dark material creating a halo around Nāwahī makes this crater of special interest, as the dark material likely represents rocks with a different chemical and mineralogical composition than those of the neighboring surface. The crater is named after Hawaiian patriot and painter Joseph Nāwahī.
WThe crater Oskison is located in the far northern hemisphere of Mercury, in the plains north of Caloris basin. Oskison is a distinctive crater with a large central peak that exposes material excavated from depth. Many chains of secondary craters are visible radiating from Oskison outward onto the surrounding smooth plains.
WPoe crater is a crater on Mercury. It has diameter about 75 km and is situated in northern part of Caloris Planitia. It is centered on 43.77°N 159.16°E
WRaditladi Basin is a large peak ring impact crater on Mercury with a diameter of 263 km. Inside its peak ring there is a system of concentric extensional troughs (graben), which are rare surface features on Mercury. The floor of Raditladi is partially covered by relatively light smooth plains, which are thought to be a product of the effusive volcanism. The troughs may also have resulted from volcanic processes under the floor of Raditladi. The basin is relatively young—probably younger than one billion years, with only a few small impact craters on its floor and with well-preserved basin walls and peak-ring structure.
WSander is a crater on Mercury within Caloris Basin. It has dark walls and bright patches on its floor. Unlike the rays of Bashō crater, the bright areas are not believed to be immature, but they are inherently bright. It is named after the German photographer August Sander (1876–1964).