Al-Khwarizmi-King Basin

(unofficial name)

Lat: 1°N, Long: 112°E, Main ring diam: 590 km, Depth: km, Rukl: (farside)

Top: Annotated Clementine image from Map-A-Planet.
Bottom: Clementine LIDAR data: altitude-coded shaded relief map

Images

(description of terms and most numeric basin data from Wood, C.A. (2004) Impact Basin Database)

Certainty of Existence	USGS Age	Wilhelms Age Group	Ring Diameters	Mare Thickness	Mascon
Uncertain	pre-Nectarian	2	250, 590 km

Basins filled with maria are named for the mare, and basins that were previously recognized as craters still bear the crater name. Basins located between craters have the names of the two opposite craters with a hyphen in between, in this case Al-Khwarizmi and King.
The name Al-Khwarizmi was originally proposed by El-Baz (1973) to signify the entire basin, but adopted by the IAU as the name for a crater within it. El-Baz suspected the existence of a 1000-km diameter ring as well as the two mentioned above.

El-Baz, Farouk. 1973. Al-Khwarizmi: A New-Found Basin on the Lunar Far Side. Science, Volume 180, Issue 4091, pp. 1173-1176
Don E. Wilhelms and Farouk El-Baz. 1977. Geologic Map of the East Side of the Moon. U.S. Geological Survey map I-948.