Apollonius is a

lunar Lunar most commonly means "of or relating to the Moon". Lunar may also refer to: Arts and entertainment * ''Lunar'' (series), a series of video games * "Lunar" (song), by David Guetta * "Lunar", a song by Priestess from the 2009 album ''Prior t ...

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 near the eastern limb of the

Moon The Moon is Earth's only natural satellite. It is the fifth largest satellite in the Solar System and the largest and most massive relative to its parent planet, with a diameter about one-quarter that of Earth (comparable to the width of ...

. It lies in the region of uplands to the west of

Mare Undarum Mare Undarum (Latin ''undārum'', the "sea of waves") is a shallow, irregular lunar mare located just north of Mare Spumans on the lunar near side, between the crater Firmicus and the eastern limb. It lies within a trough between the third and ...

and northeast of the

Sinus Successus The lunar feature Sinus Successus (Latin ''sinus successūs'' "Bay of Success") lies along the eastern edge of Mare Fecunditatis. It is an outward bulge that forms a type of bay. The selenographic coordinates of Sinus Successus are 0.9° N, 59. ...

on the

Mare Fecunditatis Mare Fecunditatis (Latin ''fēcunditātis'', the "Sea of Fecundity" or "Sea of Fertility") is a lunar mare in the eastern half of the visible Moon. The mare has a maximum diameter of 840 km. __NOTOC__ Description The Fecunditatis basin form ...

. It was named after Greek mathematician Apollonius of Perga. It is southwest of the crater Firmicus, and north of Condon. The outer rim of Apollonius is somewhat worn and is overlain by a pair of small craters (including Apollonius E) across the western wall. The nearly flat interior floor has a low

albedo Albedo (; ) is the measure of the diffuse reflection of solar radiation out of the total solar radiation and measured on a scale from 0, corresponding to a black body that absorbs all incident radiation, to 1, corresponding to a body that refl ...

and has been covered by

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 un ...

. It lacks a central peak or notable small craters across the bottom.

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 Apollonius. The following craters have been renamed by the

IAU The International Astronomical Union (IAU; french: link=yes, Union astronomique internationale, UAI) is a nongovernmental organisation with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach ...

. * Apollonius C — ''See''

Ameghino (crater) Ameghino is a lunar impact crater located to the north of the Sinus Successus, a bay in the northeast part of Mare Fecunditatis. Less than 15 kilometers to the northwest of Ameghino were the landing sites of the Soviet Luna 18 and Luna 20 probes. ...

. * Apollonius D — ''See''

Cartan (crater) Cartan is a small lunar impact crater near the eastern edge of the Moon. It lies just to the west of the larger Apollonius. The rim is circular with a tiny crater along the eastern side. The interior floor is about half the diameter of the crater ...

. * Apollonius G — ''See'' Townley (crater). * Apollonius K — ''See''

Abbot (crater) Abbot is a small lunar impact crater that lies on the rugged ground between the Mare Fecunditatis in the south and west, and the Mare Crisium to the north. It is a circular crater with a cup-shaped interior. The inner walls slope downward to the ...

. * Apollonius P — ''See''

Daly (lunar crater) Daly is a small lunar impact crater that is located in the eastern part of the Moon, to the northwest of the crater Apollonius. This formation is relatively circular, with a slight inward bulge along the northern rim. The inner wall is wider in th ...

. * Apollonius T — ''See''

Bombelli (crater) Bombelli is a small lunar impact crater that is located in the highlands to the north of the Sinus Successus The lunar feature Sinus Successus (Latin ''sinus successūs'' "Bay of Success") lies along the eastern edge of Mare Fecunditatis. It is ...

. * Apollonius W — ''See''

Petit (crater) Petit is a small, bowl-shaped lunar impact crater that is located on the northwestern edge of the Mare Spumans. The crater has a prominent ray system. The name is appropriate, since ''petite'' means small in French. But it was actually named ...

. File:Apollonius N (LROC-WAC).png, Apollonius N is a concentric crater File:Apollonius N crater AS17-P-2595.jpg, Oblique view of Apollonius N from Apollo 17

References

* * * * * * * * * * *

External links

LTO-62C1 Firmicus
— L&PI

topographic map In modern mapping, a topographic map or topographic sheet is a type of map characterized by large- scale detail and quantitative representation of relief features, usually using contour lines (connecting points of equal elevation), but historic ...

Impact craters on the Moon {{Craters on the Moon: A–B