Fornax cluster (NGC 1399 group), Eridanus subcluster (NGC 1395, NGC 1407, NGC 1332, NGC 1398 groups) and other neighboring groups of galaxies forming the Fornax complex (Makarov & Karachentsev 2011). On the scales of virial radii (dark-blue circles) these overdensities constitute separate bound groups, but they overlap substantially on scales of R₀ (light-blue regions). The velocities of groups V_LG are indicated near the names of their central galaxies. NGC 1399, as the most massive galaxy in the complex situated near the center of the hot X-ray emitting gas, is indicated as a purple circle marked with a cross. Black dots represent galaxies with measured distances. The large bold circle of radius 13.2° outlines the zero-velocity sphere (R₀ = 4.60 Mpc) around the Fornax-Eridanus cluster barycenter.