D'Arrest (crater)

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D'Arrest
D'Arrest crater 4090 h1.jpg
Coordinates 2°18′N 14°42′E / 2.3°N 14.7°E / 2.3; 14.7Coordinates: 2°18′N 14°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

D'Arrest is a lunar crater that is located in the lava-flooded region to the west of the Mare Tranquillitatis and is named after the German astronomer Heinrich Louis d'Arrest. It lies to the southeast of the crater Agrippa, north of Theon Senior and Junior, the first being about 130 km, and northwest of Delambre. Just to the northeast are the small, bowl-shaped craters De Morgan and Cayley. Also further east is Dionysius being about 60 km.

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[edit]

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 A and M are to the west, D'Arrest B is to the southwest and D'Arrest R is nearly to the south.

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[edit]

External link[edit]

Other articles[edit]

  • Wood, Chuck (December 12, 2006). "How Deep is That Hole". Lunar Photo of the Day. Archived from the original on August 3, 2017.  - includes a couple of craters such as D'Arrest (sometimes as d'Arrest)