Distribution of galaxies around NGC 253 in supergalactic coordinates. Left-hand panel: Projection on the plane of the Local Supercluster. Right-hand panel: Its edge-on view. The sizes and colours of the dots reflect the B-band absolute magnitude and morphology of the galaxies, according to the legends above. The line segments correspond to the distance errors. The dotted circles mark the virial zone of R₂₀₀ = 190 and the turn-around radius of R_ta = 710 kpc around NGC 253. The expected positions of the discovered galaxies are indicated by magenta symbols.