Bach (cratère)

Bach
Image illustrative de l'article Bach (cratère)
photographie du cratère par MESSENGER
Localisation
Astre Mercure
Coordonnées 69° S, 103° O
Géologie
Type de cratère Météoritique
Dimensions
Diamètre 214 km
Géolocalisation sur la carte : Mercure
(Voir situation sur carte : Mercure)
Bach (cratère)

Bach est le nom d'un cratère d'impact présent sur la surface de Mercure depuis 4 milliards d'années, soit la fin de la période de bombardement intense.

Le cratère fut ainsi nommé en 1976 par l'Union astronomique internationale en hommage à Johann Sebastian Bach[1]. Il s'agit d'un cratère à couronne double parfaitement circulaire qui doit son fond lisse à des épanchements de lave[2]. Son diamètre est de 214 km.

Il a donné son nom à la région de Mercure dans laquelle il se situe (quadrangle H-15), depuis la cartographie de la zone rendue possible par le passage de la sonde MESSENGER[3].

Notes et références

  1. « Planetary Names: Crater, craters: Bach on Mercury », sur planetarynames.wr.usgs.gov (consulté le )
  2. Éditeur en chef Peter Frances, Le ciel et l'univers, encyclopédie universelle, ERPI, 2006, 512 p.
  3. (en) T.J. Mahoney, Mercury, New York, Springer, , 328 p., p. 52-53

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