Chappell is a lunar

impact crater An impact crater is a depression (geology), depression in the surface of a solid astronomical body formed by the hypervelocity impact event, impact of a smaller object. In contrast to volcanic craters, which result from explosion or internal c ...

on the far side of the

Moon The Moon is Earth's only natural satellite. It Orbit of the Moon, orbits around Earth at Lunar distance, an average distance of (; about 30 times Earth diameter, Earth's diameter). The Moon rotation, rotates, with a rotation period (lunar ...

, in the northern hemisphere just to the north of the crater Debye. It is in a heavily bombarded section of the surface, and much of its outer rim is overlain by smaller craters. The northern rim in particular has been almost completely disintegrated, while small craters also overlie the rim to the northwest and southeast. What remains of the rim forms a rounded, somewhat irregular edge to the crater depression. In contrast, the interior floor is not notably marked by impacts. The interior surface is more level compared to the rugged terrain surrounding it. Near the floor's midpoint is a low, rounded central ridge, and surrounding it are a series of linear and arcuate fractures forming a nearly-complete ring around the central peak. The crater was formally named by the IAU in 1970 after American astronomer James F. Chappell.

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 Chappell.Lunar craters homepage
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References

* * * * * * * * * * * * Impact craters on the Moon {{Craters on the Moon: C-F