![]() Photo of Hokusai crater by MESSENGER | |
Planet | Mercury |
---|---|
Coordinates | 58°18′N342°18′W / 58.3°N 342.3°W Coordinates: 58°18′N342°18′W / 58.3°N 342.3°W |
Quadrangle | Hokusai |
Diameter | 95 km (59 mi) |
Eponym | Katsushika Hokusai [1] |
Hokusai is a rayed impact crater on Mercury, which was discovered in 1991 by ground-based radar observations conducted at Goldstone Observatory. [2] The crater was initially known as feature B. Its appearance was so dissimilar to other impact craters that it was once thought to be a shield volcano. However improved radar images by the Arecibo Observatory obtained later in 2000–2005 clearly showed that feature B is an impact crater with an extensive ray system. The bright appearance of rays in the radio images indicates that the crater is geologically young; fresh impact ejecta has a rough surface, which leads to strong scattering of radio waves. [2]
Hokusai is named after Katsushika Hokusai (1760–1849), a Japanese artist and printmaker of the Edo period. [3] [1] The name Hokusai was suggested by radar astronomer John K. Harmon. [4] The crater has a diameter of about 100 km; the rays extend for thousands kilometers, covering much of the northern hemisphere. [5]
Hokusai is the fourth-largest crater of the Kuiperian system on Mercury. The largest is Bartók crater. [6] Hokusai is one of 110 peak ring basins on Mercury. [7]
Degas is a rayed crater on Mercury at latitude 37.5 N, longitude 127 W. Its diameter is 54 kilometres (34 mi). It was named after the French impressionist painter Edgar Degas in 1979. The rays consist of light colored material blasted out during the crater's formation. Craters older than Degas are covered by the ray material, while younger craters are seen superimposed on the rays. Degas forms a crater pair with Brontë to the north. Both lie near the center of Sobkou Planitia.
Kuiper is a moderate-size crater with a central peak cluster located at 11.35°S 31.23°W on Mercury. It is 62 kilometers in diameter and was named after Dutch-American astronomer Gerard Kuiper in 1976. It is one of only 2 Mercurian craters which are named not after artists, and one of very few cases when the same name is used for 3 craters. Gerard Kuiper, being a leader of American planetary science, died shortly before the first images of Mercurian surface were made.
Bach is a double-ringed impact basin within in the Bach quadrangle of Mercury. It was named by the IAU in 1976.
Bashō is a crater on Mercury named after Matsuo Bashō, a 17th-century Japanese writer. Bashō crater is only 74.62 kilometers (46.37 mi) in diameter, but is a prominent feature on Mercury's surface, due to its bright rays. Photographs from NASA's Mariner 10 and MESSENGER spacecraft show a curious halo of dark material around the crater.
Amaral is a crater on the planet Mercury. With its smooth floor, surrounding ejecta, and small secondary craters, it appears noticeably younger than the heavily cratered surface around it. Along with a smooth crater floor, Amaral also has a central peak. Bright material on this peak is of particular interest as it appears to have an unusual color. In color-enhanced images, the central peak of Amaral appears as a bright blue color in striking contrast to the otherwise orange tones of surface material nearby. The different color of the central peak likely indicates rocks with different chemical composition from those on the neighboring surface.
Debussy is a rayed impact crater on Mercury, which was discovered in 1969 by low resolution ground-based radar observations obtained by the Goldstone Observatory. Later in 1990–2005 it was imaged in more detail by the Arecibo Observatory. The crater was initially known as the feature A. The bright appearance of rays in the radar images indicates that the crater is geologically young, because fresh and rough surfaces of young impact craters are good scatterers of radio waves.
De Graft is a crater on Mercury. Its name was adopted by the International Astronomical Union in 2009, after Ghanaian playwright, poet, and novelist Joe de Graft.
Derain is a crater on Mercury named after André Derain, a French artist, painter, sculptor and co-founder of Fauvism with Henri Matisse. It has uncommonly dark material within and surrounding the crater. The material is darker than the neighboring terrain such that this crater is easily identified even in a distant global image of Mercury. The dark halo may be material with a mineralogical composition different from the majority of Mercury's visible surface. Craters with similar dark material on or near their rims were seen on the floor of the Caloris basin during MESSENGER’s first flyby.
Ahmad Baba is a crater on Mercury. It has a diameter of 127 kilometers. Its name was adopted by the International Astronomical Union (IAU) in 1979.
Aksakov is a crater on Mercury. It has a diameter of 174 kilometers. Its name was adopted by the International Astronomical Union (IAU) on April 24, 2012. Aksakov is named for the Russian author Sergey Aksakov, who lived from 1791 to 1859 C.E.
Al-Hamadhani is a crater on Mercury. It has a diameter of 186 kilometers. Its name was adopted by the International Astronomical Union in 1979. Al-Hamadhani is named for the Iranian writer Badi' al-Zaman al-Hamadani, who died in 1007 C.E.
Balzac is a crater on Mercury. Its name was adopted by the International Astronomical Union in 1976. Balzac is named for the French writer Honoré de Balzac, who lived from 1799 to 1850.
Bartók is a crater on Mercury. Its name was adopted by the International Astronomical Union (IAU) in 1979. Bartók is named for the Hungarian composer Béla Bartók, who lived from 1881 to 1945.
Bernini is a crater on Mercury. It has a diameter of 146 kilometers. Its name was adopted by the International Astronomical Union (IAU) in 1976. Bernini is named for the Italian architect and sculptor Gian Lorenzo Bernini, who lived from 1598 to 1680.
Botticelli is a crater on Mercury. It has a diameter of 136.35 kilometres (84.72 mi). Its name was adopted by the International Astronomical Union (IAU) in 1979. Botticelli is named for the Italian painter Sandro Botticelli, who lived from 1445 to 1510.
Cervantes is a crater on Mercury. It has a diameter of 181 kilometers. Its name was adopted by the International Astronomical Union in 1976. Cervantes is named for the Spanish writer Miguel de Cervantes, who lived from 1547 to 1616.
Chekhov is a crater on Mercury. It has a diameter of 194 kilometers. Its name was adopted by the International Astronomical Union (IAU) in 1976. Chekhov is named for the Russian author Anton Chekhov, who lived from 1860 to 1904.
Dürer is a crater on Mercury. It has a diameter of 195 kilometers. Its name was adopted by the International Astronomical Union (IAU) in 1976. Durer is named for the German artist Albrecht Dürer, who lived from 1471 to 1528.
Caravaggio is a large crater on Mercury. The crater was named after the Italian painter Caravaggio by the IAU in 2013.
Alver is a crater on Mercury. It has a diameter of 151.49 kilometers. Its name was adopted by the International Astronomical Union (IAU) on March 15, 2013. Alver is named for the Estonian poet Betti Alver.