D'Arrest (crater)

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D'Arrest
D'Arrest crater 4090 h1.jpg
Coordinates 2°18′N14°42′E / 2.3°N 14.7°E / 2.3; 14.7 Coordinates: 2°18′N14°42′E / 2.3°N 14.7°E / 2.3; 14.7
Diameter 30 km
Depth 1.5 km
Colongitude 344° at sunrise
Eponym Heinrich d'Arrest
The crater area in a Selenochromatic format Image (Si) Dionysius crater Area Si.jpg
The crater area in a Selenochromatic format Image (Si)
Oblique view from Apollo 12 D'Arrest crater AS12-52-7721.jpg
Oblique view from Apollo 12

D'Arrest is a lunar impact crater that is located in the lava-flooded region to the west of the Mare Tranquillitatis. It is named after the German astronomer Heinrich Louis d'Arrest. [1] It lies to the southeast of the crater Agrippa and northwest of Delambre. Just to the northeast are the small, bowl-shaped craters De Morgan and Cayley.

Contents

The outer rim of D'Arrest is broken in several places, with a gash at the south end and a wide gap to the northeast where only a low ridge remains in place of the original wall. The interior has been resurfaced by lava, leaving a nearly flat, featureless floor. The surviving rim is low and worn, with ridges connecting it to the south and southwest.

Satellite craters

D'Arrest crater and its satellite craters taken from Earth in 2012 at the University of Hertfordshire's Bayfordbury Observatory with the telescopes Meade LX200 14" and Lumenera Skynyx 2-1 DArrest lunar crater map.jpg
D'Arrest crater and its satellite craters taken from Earth in 2012 at the University of Hertfordshire's Bayfordbury Observatory with the telescopes Meade LX200 14" and Lumenera Skynyx 2-1

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

D'ArrestLatitudeLongitudeDiameter
A1.9° N13.7° E4 km
B1.0° N13.6° E5 km
M1.9° N13.6° E23 km
R0.5° N15.6° E19 km

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References

  1. "D'Arrest (crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.