In my opinion (I am physician, I have made some connection between different information) Nibiru has Two Orbits (real and imaginary):
1. The real elliptical orbit: Apogee – Perigee – Apogee = 3600 years.
2. The circular orbit (imaginary) – around the Sun is (Now) = 550 years.
3. After 1- 5 years the black point or white circle (Nibiru) will be on its way on its elliptical orbit at 450, 250, 100,etc. years around the Sun… and so on.
4. Perigee – the nearest point to Earth (between Mars and Jupiter) – 10 years around the Sun (for example).
Alessandro Morbidelli is the author of the above drawing - astronomer at the Cote D’Azur Observatory – Science et Vie magazine ( February 2003 ).