The object "has a mass about 10 times that of Earth" and follows a "bizarre, highly elongated orbit in the distant solar system," said a statement by researchers at the California Institute of Technology (Caltech).
"In fact, it would take this new planet between 10,000 and 20,000 years to make just one full orbit around the Sun."
The report was published in the Astronomical Journal.
Researchers Konstantin Batygin and Mike Brown say they found the planet through mathematical modeling and computer simulations, and have not yet observed the object directly .... http://news.yahoo.com
