with variable step-width, was used. All planets were considered as perturbing bodies and the Earth and Moon were treated separately.

The integration shows that both sets of clones behave in a similar way. Figure 8 depicts the heliocentric distance of the ascending and descending node of the nominal orbit and the clones integrated 5000 years to the past. The ascending node of the nominal orbit gradually falls and retreats from the orbit of the Earth to $\sim0.4-0.6$AU from the Sun. The descending node is initially close to the Sun ($\sim0.25$AU) and rises slowly to ($\sim0.3\pm0.1$AU). Clones of the altered orbit, that start with the ascending node at the orbit of the Earth, behave the same way but remain within 0.05AU of the Earth’s orbit about 2000yr to the past.

The evolution of the orbital elements of the comet and its clones is depicted in Figure 9. The most probable value (1$\sigma$) of the semimajor axes of cloned orbits is in the range of $a\subset(25;30)$AU, while the nominal semimajor axis rises up to 40AU 2500 BC. The inclination of both clones and the nominal orbit falls from initial 32$^\circ$ down to $i\subset(26;30)$$^\circ$. Even at 3000yr BC, the inclination is not low 