On Wednesday, January 20, 2016 at 6:27:14 PM UTC-5, Chris L Peterson wrote:
On Wed, 20 Jan 2016 14:31:26 -0800 (PST), RichA
wrote:

Read this and find the flaw:

CNN:

Researchers at the California Institute of Technology have found evidence in the outer solar system of an object that could be a real ninth planet.

Nicknamed Planet Nine, it "has a mass about 10 times that of Earth and orbits about 20 times farther from the sun" than Neptune. That means "it would take this new planet between 10,000 and 20,000 years to make just one full orbit around the sun," according to Caltech.

I don't know, what is it you don't like? Except for referring to
orbital distances as average to allow for eccentricity, this is
straight out of the Caltech press release, and seems just fine.

And you would be right, it was my mistake, I didn't read it clearly and mistook the distance for an Earth-new planet distance and not a Neptune-new planet multiple. The orbital period is about 15,000 years.