Determination of the magnitude of the oblateness of the early sun on the basis of the inclination of planetary orbits

The magnitude of the solar oblateness in the epoch of the origin of the planetary system is determined to be 0.12 on the basis of the inclination of the planetary orbits to the ecliptic plane. The analysis includes the determination of the precession of planetary orbits under the effect of a force moment, the rotational moment arising as a result of perturbations, the perturbation of planetary orbits under the effect of the sun, the precession of planetary orbits under the combined effect of the sun and planets, and the calculation of the effective disturbing radius of the sun.