La Caille (crater)

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The crater area(bottom right) in a Selenochromatic format Image (Si) Ptolemaeus trium area Si.jpg
The crater area(bottom right) in a Selenochromatic format Image (Si)
La Caille
La Caille crater 4108 h1.jpg
Coordinates 23°48′S1°06′E / 23.8°S 1.1°E / -23.8; 1.1 Coordinates: 23°48′S1°06′E / 23.8°S 1.1°E / -23.8; 1.1
Diameter 68 km
Depth 2.8 km
Colongitude 358° at sunrise
Eponym Nicolas-Louis de Lacaille

La Caille is a lunar impact crater located in the rugged south-central highlands of the Moon. It was named after the French astronomer Nicolas-Louis de Lacaille. [1] It is located to the northeast of the crater Purbach. Nearly attached to the southeast rim are the remains of Blanchinus, and the two are separated by a rugged stretch of terrain. To the northeast is Delaunay, a formation split in half by a ridge.

Contents

The floor of La Caille has been flooded in the past by lava, and the surface is relatively smooth and flat with no central rise. Only a few tiny craterlets along the north and northwest edges disrupt the surface. Ray material lies across the central and southern parts of the floor, most likely from Tycho to the southwest.

The rim of this crater is heavily worn and battered, with notches around the interior edge and craters across the top and along the exterior. The most notable of these is La Caille B which lies across the eastern rim.

For a few hours before the first quarter, the crater's rim contributes to the Lunar X visual phenomenon.

Satellite craters

La Caille 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 LaCaille lunar crater map.jpg
La Caille 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 La Caille.

la CailleLatitudeLongitudeDiameter
A22.8° S0.4° E8 km
B20.9° S1.4° E7 km
C21.2° S1.4° E15 km
D23.6° S2.2° E12 km
E23.5° S2.8° E27 km
F23.6° S3.4° E8 km
G20.5° S2.0° E11 km
H24.7° S0.8° E6 km
J22.5° S0.9° E5 km
K21.0° S0.6° E30 km
L24.6° S1.4° E5 km
M22.3° S1.6° E15 km
N21.9° S1.3° E10 km
P22.5° S0.0° E25 km

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References

  1. "La Caille (crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.