Mare Tranquillitatis

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Tranquillitatis Basin

(unofficial name; IAU feature name for central 873 km of mare: Mare Tranquillitatis)

Lat: 8.5°N, Long: 31.4°E, Main ring diam: 700 km, Depth: km, Rükl: 36

external image normal_agrippa23051.jpgexternal image normal_mare-tranquillitatis-clem1.jpg
Left: Eric Soucy, Right: Clementine


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(LAC zone 61A4) LAC map Geologic map LTO map

Basin Classification

(description of terms and most numeric basin data from Wood, C.A. (2004) Impact Basin Database)
Certainty of Existence
Wilhelms Age Group
Ring Diameters
Mare Thickness
700, 950 km
1.0 km
No; -40 mG gravity anomaly


Description: Wikipedia

Mare Tranquillitatis

Additional Information


The IAU feature name means "Sea of Tranquility".
  • Called the body of the man in reference to a pre-Galileo telescopic sketch map by Thomas Harriot in ~1609 [Whitaker: Mapping and Naming the Moon, p 17]
  • The impact basin is named after the crater.
  • Erroneously printed as Mare Tranquilitatis (1 "l") on page 13 (nearside map) in the 21st Century Atlas of the Moon (2012).- DannyCaes Jan 23, 2013

LPOD Articles

Going Extreme An Elusive Phase How Can You Be Tranquil When So Much Is Happening Color on the Cheap Tranquil Sunshine Western Tranquillitatis


Wood, C.A. Aug. 2003. Treasurers of western Tranquillitatis. S&T August 2003 v106 p120