"Trailing" the Solar system and "orbiting in the opposite direction" also allowed to minimize the external compensatory measures to maintain the stability of the planets of the Solar system, as well as a smooth "landing" of "Nibiru" at the targeted libration point and its further orbital movement in the desired direction.
All of these "maneuvers" are a direct and clear evidence of an artificial nature of the forces that controlled the transit of "Nibiru".
This is why the Sumerian astronomers referred to this planet, that appeared from an unknown place, as the "transient". In Babylonian mythology, this planet is called Marduk.
Marduk (Nibiru) was to become the new home of the "gods of Heaven and Earth".Having reached its position in the Solar system in a collinear libration point that is located diametrically opposite the Earth in the third orbit, Marduk (Nibiru) here began its orbit, in the same plane and with the same velocity as planet Earth.
Nibiru does not have, nor ever has had a 3,600-year orbit reaching beyond the confines of the Solar system. This 3,600-year cycle is merely an estimation of "Nibiru's" relative orbital velocity based on its traversal of the Solar system, back then.
Marduk (Nibiru) is no artificial object, it is a living planet that was borrowed from a dying Solar system and "towed" here. Its mass, however, exceeds that of the Earth considerably.
To stabilize its orbit, the Moon (largest fragment of Tiamat) was then maneuvered into the Earth's gravitational field, increasing its mass by that of the Moon, together counter-balancing the mass of planet Marduk (Nibiru).