Geological Chronicle
Dyson is an impact crater measuring 63.14 kilometers in diameter on the northern far side of the Moon, situated past the northwest limb. Positioned east of van't Hoff and northwest of Coulomb, the formation rests along the approximate margin of the Pre-Nectarian Coulomb-Sarton Basin, an ancient impact structure spanning 530 kilometers.
The crater displays pronounced internal asymmetry. Along the northeastern perimeter, the rim drops low and the inner wall narrows to near non-existence where it overlies an older, unnamed depression. Across the remaining clockwise arc from the eastern rim round to the north, the wall broadens substantially, shifting the level floor toward the northeast.
At the interior midpoint, a central peak anchors a linear ridge extending westward to meet the inner wall. While impact erosion has worn the surrounding rim and slopes, no significant younger strikes disrupt the interior, leaving the remaining floor largely featureless aside from scattered minute craterlets.