Mare Ingenii

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Ingenii Basin (with Thomson at its NE part)

(unofficial name; IAU feature name for central 318 km of mare: Mare Ingenii )

Lat: 33.7°S, Long: 163.5°E, Diam: 315 km, Depth: km, Rükl: (farside)

external image normal_mare-ingenii-clem1.jpgIngenii.jpg

external image normal_Igenii-Basin_LIDAR_LTVT_Pike-Spudis_rings.JPG

Left: Clementine Basemap , Middle: LROC . Light swirls at SW sector of Mare Ingenii, the antipode of Imbrium Basin; craterlets chains at upper left coming from O'Day.
Right: Clementine LIDAR Data, altitude-coded shaded relief from PDS Map-a-Planet remapped to north-up aerial view by LTVT. The dot is the center position and the red circle the main ring position from Chuck Wood's Impact Basin Database. The white circles indicate the positions of the remaining rings according to the Pike & Spudis data.


LPOD Photo Gallery Lunar Orbiter Images Apollo Images

  • AS15-87-11724 is the first one of two spectacular orbital Hasselblads which show Mare Ingenii and its flooded crater Thomson (at Mare Ingenii's northeastern part). Looking south. Note the strange swirl-shaped albedo features in Mare Ingenii's plain. - DannyCaes Dec 27, 2007
  • AS15-91-12374 is a curious tan-colored Hasselblad of a small area at Mare Ingenii's northern rim (at 28° South/ 163° East). A reproduction of this Hasselblad was included on page 257 of the splendid article To The Mountains of the Moon by Kenneth F. Weaver (National Geographic, February 1972). Research: - DannyCaes Dec 27, 2007
  • Kaguya HDTV image, looking north. Those swirls!
  • Mare Ingenii at the curved horizon in Apollo 17's south looking oblique Fairchild camera frame AS17-M-1553.- DannyCaes Aug 7, 2013


(LAC zone 119A2) USGS Digital Nomenclature Atlas

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
165, 315, 450, 660 km
No; -36 mG gravity anomaly
  • Note: this main ring diameter is from Pike & Spudis (1987). Wilhelms (1987) gives 560 km.


Description: Wikipedia

Mare Ingenii

Additional Information


  • The IAU feature name is Latin for "Sea of Cleverness".
  • Discovered in Lunik 3 imaging of farside and named in Atlas of the Other Side of the Moon. Approved by the IAU in 1961 (Whitaker, p 232).
  • The impact basin is named after the mare.
  • Once called "Object A" (see: V.A.Firsoff's The Old Moon and the New; Page 166 and Plate 13b) - DannyCaes Jun 1, 2008
  • A distinct rille at the most northern part of Mare Ingenii (south-southeast of Paracelsus M) was unofficially called Vallis Alpha Reed during the hey-days of project Apollo (see: Apollo 15 Flight Journal by David Woods and Frank O'Brien, at 81:15:41 GET in the mission). - DannyCaes Jun 1, 2008

LPOD Articles

Bird's Feet and Droppings?


  • Testa, Bridget Mintz; A Swirl of Moondust, ASTRONOMY October 1994, pages 28 to 35 (page 33 contains a scheme and a Lunar Orbiter 5 photograph of the Mare Ingenii swirl-field).