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Mercurius is Latin for Mercury and may refer to:

  • Mercury (mythology) or Mercurius
  • Mercurius (crater), a crater on the Moon
  • Saint Mercurius
  • The name of the demon from the German fairy tale The Spirit in the Bottle
  • OZ-13MSX2 Mercurius, a mobile suit from New Mobile Report Gundam Wing
  • Pope John II, whose given name was Mercurius
  • Mercurius Oxoniensis, pen-name of Hugh Trevor-Roper
  • Mercurius of Transylvania, voivode of Transylvania
Mercurius (crater)

Mercurius is a lunar impact crater that is located in the northeastern part of the Moon. It lies to the northeast of the smaller crater Carrington, and west-northwest of Zeno. Just to the south is the small lunar mare named Lacus Spei, and to the west is the larger Lacus Temporis.

The rim of Mercurius is circular, with a somewhat irregular edge. There are small outward bulges along several sections of the rim, with the most notable bulges being along the eastern and southern sides. The inner wall has slumped around much of the perimeter, producing a sharp edge. The sides are also somewhat worn, with some tiny craterlets overlying the inner wall.

Within the rim the interior floor has been resurfaced by lava and is nearly level, with a slight hint of a central mound. The remainder of the floor is marked only by a few tiny craterlets and some low ridges in the northeastern corner.