[en] The map of the surface brightness B of the galaxy is constructed and the standartization of brightness in the U, B, V-system of the photographic measurements with the help of comparison with the photoelectric ones is performed. The distribution of colour over the galaxy disc is obtained after supplementary correction of zero points of colour indices, which were measured earlier. The photometric centre of brightness of M 82 is close to the dynamic centre. The results are necessary for the construction model of the galaxy M 82. The discovered phenomenon of the asymmetry of the colour distribution in the southern and northern parts of M 82 is discussed on the basis of the rough three-component model of the galaxy. The values of the optical thickness of dust in function of the distance from the centre along the major axis of the galaxy was obtained