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]
The rays of Hokusai crater (near central horizon) extend across much of the planet
^ abHarmon, John K.; Slade, Martin A.; Butler, Bryan J.; Head, James W.; Rice, Melissa S.; Campbell, Donald B. (2007). "Mercury: Radar images of the equatorial and midlatitude zones". Icarus. 187 (2): 374–405. Bibcode:2007Icar..187..374H. doi:10.1016/j.icarus.2006.09.026.
^"Hokusai (crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
^"Hokusai Paints a Wave of Rays". NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington. 11 May 2010. Archived from the original on 5 October 2013. Retrieved 13 May 2012.
^Denevi, B. W., Ernst, C. M., Prockter, L. M., and Robinson, M. S., 2018. The Geologic History of Mercury. In Mercury: The View After MESSENGER edited by Sean C. Solomon, Larry R. Nittler, and Brian J. Anderson. Cambridge Planetary Science. Chapter 6, Table 6.4.
^Chapman, C. R., Baker, D. M. H., Barnouin, O. S., Fassett, C. I., Marchie, S., Merline, W. J., Ostrach, L. R., Prockter, L. M., and Strom, R. G., 2018. Impact Cratering of Mercury. In Mercury: The View After MESSENGER edited by Sean C. Solomon, Larry R. Nittler, and Brian J. Anderson. Cambridge Planetary Science. Chapter 9.
.jpg)
