Seleucus is a lunar

impact crater An impact crater is a circular depression in the surface of a solid astronomical object formed by the hypervelocity impact of a smaller object. In contrast to volcanic craters, which result from explosion or internal collapse, impact crater ...

located in the western part of

Oceanus Procellarum Oceanus Procellarum ( la, Ōceanus procellārum, lit=Ocean of Storms) is a vast lunar mare on the western edge of the near side of the Moon. It is the only one of the lunar maria to be called an "Oceanus" (ocean), due to its size: Oceanus Proc ...

. To the west is the

lava Lava is molten or partially molten rock ( magma) that has been expelled from the interior of a terrestrial planet (such as Earth) or a moon onto its surface. Lava may be erupted at a volcano or through a fracture in the crust, on land or ...

-flooded remains of the walled plain

Eddington Eddington or Edington may refer to: People * Eddington Varmah, Liberian politician * Eddington (surname), people with the surname Places Australia * Eddington, Victoria United Kingdom * Eddington, Berkshire * Eddington, Cambridge * E ...

. To the southwest is the crater Krafft and to the northwest lies Briggs. The rim of Seleucus is well-formed, with a

terrace Terrace may refer to: Landforms and construction * Fluvial terrace, a natural, flat surface that borders and lies above the floodplain of a stream or river * Terrace, a street suffix * Terrace, the portion of a lot between the public sidewalk an ...

d inner rim and a slight

rampart Rampart may refer to: * Rampart (fortification), a defensive wall or bank around a castle, fort or settlement Rampart may also refer to: * "O'er the Ramparts We Watched" is a key line from "The Star-Spangled Banner", the national anthem of the ...

. The floor is relatively flat, with a small central peak. A bright ray from Glushko crater, about 500 km to the southwest, grazes the southeastern rim of Seleucus. The narrowness of the rim of Seleucus and the abrupt contact between its raised rim and the surrounding

mare A mare is an adult female horse or other equine. In most cases, a mare is a female horse over the age of three, and a filly is a female horse three and younger. In Thoroughbred horse racing, a mare is defined as a female horse more than f ...

prove that the final mare flooding occurred after the crater was formed, and so the crater is older than the youngest (uppermost) mare basalts in the vicinity.Apollo Over the Moon: A View from Orbit (online version)
(NASA SP-362), 1978, caption of Figure 31 Approximately 50 kilometers to the southeast of Seleucus, on the Oceanus Procellarum, is the landing site of the

Soviet The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, it was nominally a federal union of fifteen national ...

landing craft Luna 13.

Satellite craters

By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Seleucus.

References

* * * * * * * * * * * * {{refend Impact craters on the Moon

Satellite craters

See also

References