D'Arrest (crater)

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.

D'Arrest
Coordinates2.3°N 14.7°E / 2.3; 14.7
Diameter30 km
Depth1.5 km
Colongitude344° at sunrise
EponymHeinrich d'Arrest
The crater area in a Selenochromatic format Image (Si)
Oblique view from Apollo 12

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

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'Arrest Latitude Longitude Diameter
A 1.9° N 13.7° E 4 km
B 1.0° N 13.6° E 5 km
M 1.9° N 13.6° E 23 km
R 0.5° N 15.6° E 19 km

References

  1. "D'Arrest (crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  • Wood, Chuck (December 12, 2006). "How Deep is That Hole". Lunar Photo of the Day. Archived from the original on June 14, 2011. - includes a couple of craters such as D'Arrest (sometimes as d'Arrest)
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