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Distance moduli µ were derived from primary and secondary indicators for a dozen nearby groups (Sculptor, M81, M51-M101, CVn I, CVn II, M66, M96, NGC 3190, NGC 1023, etc.) including a total of 68 galaxies (MG < - 16) with known magnitudes and diameters in the standard systems. From this sample the following relations were derived for the absolute magnitude MG (n) and linear diameter D(n) of the nth brightest or largest galaxy in a group.