The outer rim of this crater is an irregular series of ridges in a roughly circular formation. There are multiple gaps through this rim, connected the interior to the mare in the west. The wall is at its thickest along the eastern side of the crater.
The interior floor has been resurfaced by lava, leaving a level, featureless surface that has no markings or impacts of note. The central region of the inner floor has a relatively low albedo compared to the surrounding terrain, giving it a dark appearance that matches the nearby mare.
Satellite craters
By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Lyell.
Lyell
Latitude
Longitude
Diameter
A
14.3° N
39.6° E
7 km
B
14.4° N
38.4° E
5 km
C
15.2° N
39.4° E
5 km
D
14.7° N
41.5° E
18 km
K
15.3° N
40.9° E
5 km
The name Abduh was proposed for Lyell A, but this was not approved by the IAU.[2]
References
^"Lyell (lunar crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
Menzel, D. H.; Minnaert, M.; Levin, B.; Dollfus, A.; Bell, B. (1971). "Report on Lunar Nomenclature by the Working Group of Commission 17 of the IAU". Space Science Reviews. 12 (2): 136–186. Bibcode:1971SSRv...12..136M. doi:10.1007/BF00171763. S2CID122125855.