(unofficial name; IAU feature name for central 420 km of mare: Mare Marginis)
Lat: 13.3°N, Long: 86.1°E, Main ring diam: 580 km, Depth: km, Rükl 38
Left: LOIV-165-H3, Right: Clementine, Clementine LIDAR Altimeter texture from PDS Map-a-Planet remapped to north-up aerial view by LTVT. The dot is the center position and the white circle the main ring position from Chuck Wood's Impact Basin Database. Grid spacing = 10 degrees.
(description of terms and most numeric basin data from Wood, C.A. (2004) Impact Basin Database)
|Certainty of Existence
||Wilhelms Age Group
- A swirl of 50,000 km^2 is associated with the northern end of the mare (Hughes and others, 2006)
- Mare area of 64,900 km^2 according to measurements by Jim Whitford-Stark.
The IAU feature name means "Sea of the Edge".
- Named by Franz: Whitaker: Mapping and Naming the Moon, p 225.
- The impact basin is named after the mare.
- A set of dark mare-like regions west of Mare Marginis and east of Alhazen - Hansen has been unofficially named Lacus Risus Felis by Charles Wood (Sky and Telescope, June 2000, p. 118; and Wood, 2003 -- see LPOD link, below).
Wood, C.A. 11/2005. Mysteries of the Eastern Limb. S&T 110(5):62-63