Astronomy:Davies (crater)

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Short description: Crater on Mars
Davies Impact Crater on Mars.jpg
This image is a screenshot of RedMapper's website and shows the Davies crater near Arabia Terra
CoordinatesCoordinates: 45°58′N 0°05′W / 45.96°N 0.09°W / 45.96; -0.09

Davies is a crater on Mars located at 46°N 0°E on the fringe of Acidalia Planitia near Arabia Terra. It is approximately 48 km in diameter. The crater's name was formally approved by the IAU in 2006.[1]

It was named in honor of Merton Davies (1917-2001), a pioneer in the cartography of planetary bodies. An employee of the RAND Corporation, he assisted NASA in mapping Mars with colleagues Gérard de Vaucouleurs and Harold Masursky and defined the prime meridian of Mars as passing through the crater Airy-0. Davies Crater lies on the prime meridian, appropriate because Davies was responsible for its delineation.[2]

Davies crater, MRO CTX camera
Viking Orbiter 2 mosaic showing the crater and its extensive ejecta


  1. Davies, Gazetteer of Planetary Nomenclature, International Astronomical Union (IAU) Working Group for Planetary System Nomenclature (WGPSN)
  2. Where is zero degrees longitude on Mars?, ESA / Science & Exploration / Space Science / Mars Express, 19 August 2004