Lassell (lunar crater)

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Crater characteristics
Coordinates	15.5° S, 7.9° W
Diameter	23 km
Depth	0.9 km
Colongitude	8° at sunrise
Eponym	William Lassell

Lassell is a small lunar crater that is located in the eastern part of the Mare Nubium. It lies to the west of the Alpetragius crater, and southwest of the Alphonsus walled-basin.

The interior of Lassell crater has been flooded and resurfaced by lava, leaving a nearly flat surface with a low remaining outer rim. The surface has a low albedo, giving the interior a dark appearance. The surviving outer wall is generally circular but with a somewhat polygonal shape.

To the east-northeast is a circular, bowl-shaped crater designated 'Lassell B'. This formation has a higher albedo than its surroundings and so appears relatively bright, especially at high sun angles.

The tiny crater 'Lassell D' is located to the west-northwest of Lassell, about half way toward the ruined Guericke crater. This craterlet is surrounded by a patch of high albedo surface, and is an example of a prominent lunar bright patch. The light hue is thought to be an indication of recent formation, at least in lunar geologic terms.

[edit] Satellite craters

By convention these features are identified on lunar maps by placing the letter on the side of the crater mid-point that is closest to Lassell crater.

Lassell	Latitude	Longitude	Diameter
A	16.8° S	6.8° W	3 km
B	16.1° S	7.7° W	4 km
C	14.7° S	9.3° W	9 km
D	14.5° S	10.5° W	2 km
E	18.2° S	10.2° W	5 km
F	17.1° S	12.5° W	5 km
G	14.8° S	9.0° W	7 km
H	14.5° S	11.2° W	5 km
J	14.8° S	10.4° W	4 km
K	15.1° S	8.9° W	4 km
M	14.2° S	8.8° W	3 km
S	18.2° S	8.5° W	4 km
T	17.1° S	8.8° W	2 km

[edit] References

• See the reference table for the general listing of literature and web sites that were used in the compilation of this page.