Craterra

Lunar impact crater · far side of the Moon

Fridman’s damaged rim meets Ioffe

The crater’s northeastern edge is attached to Ioffe, while its damaged rim is most intact on the southeast. Fridman also lies within the ejecta blankets of Hertzsprung and the Mare Orientale basin.

Feature Profile & Selenographic Data

Feature type
crater
Coordinates
12.48° S · 126.88° W
Diameter
101.45 km
IAU approval
1970/01/01 00:00:00
LAC quadrangle
LAC-89 · Lucretius

Geological Chronicle

Fridman is the remains of an impact crater on the Moon’s far side. It lies due south of the huge walled plain Hertzsprung, with its northeastern rim attached to Ioffe. The feature sits in the southern part of the ejecta blanket around Hertzsprung and the west-northwestern part of the huge blanket surrounding the Mare Orientale impact basin.

The outer rim is heavily damaged, with smaller craters scattered across its sides. Its most intact portion is along the southeastern side. The southwestern floor is partly overlaid by Ioffe’s outer rampart, while several small craters mark the northern floor and tiny craterlets dot the southeast.

The name appears in more than one form: the crater is called Friedmann in some sources. The registry traces the name to Aleksandr Alexandrovich, a Soviet physicist (1888–1925). On lunar maps, satellite features are identified by letters placed on the side of a crater midpoint closest to Fridman.

Chronology & Exploration

  1. Undated Crater remnant described

    Fridman is identified as the remains of an impact crater on the Moon’s far side, south of Hertzsprung and attached to Ioffe’s northeastern rim.

  2. Undated Ejecta setting recorded

    The crater lies within the southern part of Hertzsprung’s ejecta blanket and the west-northwestern part of the blanket surrounding the Mare Orientale impact basin.

  3. Undated Alternate name noted

    Some sources call the crater Friedmann; the registry gives its name origin as Aleksandr Alexandrovich, a Soviet physicist (1888–1925).

Scientific Sources & References

Name Origin

Aleksandr Alexandrovich; Soviet physicist (1888-1925).

Interactive Lunar Surface

Explore Fridman (Friedmann) in 3D

Inspect lunar elevation data and the official selenographic position.