[en] Full text: Form of a fission nucleus in the scission point is determined by the relation of the future fragments masses, deformation, shell structure and quantum-mechanical effects (nuclear temperature, nuclear friction, intranuclear interaction). It is important to establish the contribution of each of these factors in dynamics of nuclear fission, that will allow more precisely to describe formation of the fragments nuclei at descent from the saddle point to the scission point. In the final account, the form of a nucleus determines kinetic energy of scattering fragments and their energy of excitation, and energy of deformation. The kinetic energy, charge and masses of scattering fragments are experimentally determined. Using modeling performances of fission process, by these experimental results it is possible to find the form of a fission nucleus in the scission point. On procedure in detail described in [1] there was determined a distance between fragments in the scission point at the fixed values of kinetic energy E_k for an easy fragment in a range of mass numbers 68 < A < 110 in case of fission ²³⁵U by thermal neutrons. The values of a fragment charge Z_L were used from work [2]. Further on a technique offered in work [3], there were determined sizes of fragments nuclei and their parameters of deformations β_L and β_h. The executed accounts show, what at values 88 MeV < E_k < 108 MeV the spherical form at fragments with A_L = 76 and A_h = 134 (β_L, β_h ∼ 0) is observed. These fragments are formed with small excitation; the issue of neutrons from them practically is absent. At additional to them of fragments (A_h = 160, A_L = 102) are observed of the large energy of excitation and deformation. The fragments with A_L < 76 and A_h < 130 pass from the spherical form to flatten form. The fragments with A_h < 126 again get the extended form. If to fix any measuring parameters (E_k, TKE, Z_L/Z_h, A_L/A_h) and to use independent yield of fragments, it is possible to determine a degree of influence of these parameters on the form of a fission nucleus in the scission point. The dependences between these parameters are established. (author)