Dirichlet is a lunar impact crater that is located on the Moon's far side. It lies on the eastern margin of the Dirichlet-Jackson Basin, and is nearly attached to the southern outer rim of the crater Henyey. To the south-southeast is the much larger crater Tsander.
On the lunar geologic timescale, this formation dates to the Late Imbrian period. It is a circular crater with a sharp-edged rim that is not significantly worn. There are slight outward protrusions along the eastern side. The sides of the inner walls have slumped down to form a ring of scree along the base.
This formation is named after German mathematician Peter G. L. Dirichlet (1805-1859). Its designation was officially adopted by the International Astronomical Union in 1970.
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 Dirichlet.
DirichletLatitudeLongitudeDiameterE12.2° N147.8° W26 km
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