Nibiru/Planet X is our Sun's dark binary

Nibiru is a brown dwarf with seven planets or satellites orbiting it.

It is our Sun's binary and is responsible for the 26,000 years precession of the equinoxes.

To be precise, Nibiru becomes our Sun's binary only when it is less than 400 au from the Sun, when it is farther away from that, the Sun breaks free from Nibiru's influence, and Nibiru becomes just a brown dwarf orbiting the Sun.

This means the precession of the equinoxes happens only when Nibiru is less than 400 au from the Sun, and the rate of precession increases whenever Nibiru is on its way to perihelion.

It is observed that the rate of precession is increasing, and this means Nibiru is currently approaching the Sun in its orbit.

Nibiru's orbital period around the Sun is approximately 26,000 years.

While the seven planets orbiting Nibiru has orbital periods approximately 3,600 years.

Also the orbital distance of the 7 planets with respect to Nibiru can reach upto 100 au.

So even if Nibiru's perihelion with the Sun is only around 150-200 au, the 7 planets orbiting Nibiru can get closer to our Sun at distances around 50 - 100 au from the Sun.

The Kuiper belt is located at 30-50 au. This means the 7 planets of Nibiru is able to reach the edge of the Kuiper belt quite easily during Nibiru's perihelion. And this is the reason why there is a sudden drop or disappearance of icy objects beyond 50 au, and this region is called the Kuiper cliff.

Also, whenever Nibiru is nearing its perihelion, the Sun's gravitational influence on the Nibiru's 7 planets becomes stronger than Nibiru's.

So the 7 planets are pulled towards the Sun and crosses the orbits of our inner solar system planets, including the Earth.

However, the 7 planets do not become permanent satellites of the Sun because it achieves an orbital velocity greater than the Sun's escape velocity. So as soon as the seven planets swing past the Sun, they are recaptured by Nibiru's gravitational influence.