Geological Chronicle
Located on the far side of the Moon behind the eastern limb, Seyfert spans 102.63 kilometers in diameter. It sits east of the crater Espin, with Harriot positioned closely to the north and Polzunov to the south. The crater exhibits an outer rim that is slightly elongated toward the north, and its northern inner wall is wider to the west of the overlapping satellite crater Seyfert A.
The northeastern margin of Seyfert is overlain by Seyfert A, an impact feature with a central ridge on its floor. Within Seyfert itself, a modest low ridge rises near the midpoint of a relatively level floor marked by tiny craterlets. Traces of the ray system from Giordano Bruno to the northwest lie along the rim and interior floor.
Several small craters mark the feature, including a merged group of craters along the eastern inner wall and an intrusion into the southeastern rim. Before the International Astronomical Union formally named it in 1970 for astronomer Carl Keenan Seyfert, the crater was designated Crater 120.