It's a 3,600 year orbit. It also doesn't come any closer than outside of the asteroid belt. Good estimates push its appearance sometime on the other side of the year 3000.

Nibiru is definitely real. The Anunaki are real also. Documentation exists in the form of clay tablets set down over 6000 years ago in Sumer. Try listening to the audio of 14 clay tablets translated: https://www.youtube.com/watch?v=6vOHXOgmoP4 This link is to the first tablet. The other 13 are easy to find. Nibiru orbits approx every 3600 years. It is not in a planar orbit with the rest of the planets in our solar system. It does not come any closer than outside the asteroid belt. But it is large enough to still cause trouble with the earth. It's what caused the Antarctica ice cap to slide off its continent and cause a mega tsunami that traveled around the earth seven times. That was the great flood! It's a fascinating read and shunned by modern science and established religion as a fairy tale. But the things they knew could not have been known by a stone age people. Read (listen to) these tablets and be amazed. The Anunaki have been around for over a half billion years. They created man as a slave race through dna combination with an early primate. They were made to mine for gold and till the ground for food to keep the Anunnaki fed.