Hartmann 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 ...

. It lies astride the west-southwestern rim of the huge walled plain Mendeleev, and intrudes part way into the wide inner wall of this feature. Nearly attached to the northwestern rim of Hartmann is the crater

Green Green is the color between cyan and yellow on the visible spectrum. It is evoked by light which has a dominant wavelength of roughly 495570 nm. In subtractive color systems, used in painting and color printing, it is created by a com ...

. The unusual placement of this crater and the proximity of Green have given Hartmann a somewhat oddly shaped outer rim. The rim is slightly oblong in shape and it has an outward bulge to the east. The inner wall is wider on the eastern side, offsetting the interior floor to the western side. This floor is also oval in shape and is somewhat irregular. The crater was named after German astronomer Johannes Franz Hartmann in 1970. Prior to that, this crater was designated ''Crater 217''.Lunar Farside Chart (LFC-1A)
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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 Hartmann. AS11-43-6435

References

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External links

Hartmann at The Moon Wiki
{{Authority control Impact craters on the Moon