The predicted orbit of this undiscovered planet is highly elliptical and could give us clues as to where to look. It is at a 30 degree offset from the plane of the inner 5 planets. It is as far as 100 billion miles and as close as 20 billion miles and has a mass of about 8 to 10 Earth masses.

A 'year' for this possible ice rock planet could be about 20,000 years or longer. The only certainty now is that we have a lot more to learn about interactions and planet sized objects in the Kuiper Belt

Dave don't we have other wide field telescopes today that have a chance over time of finding this faint thing but the LSST's 32,000 mega pixel camera is 100 times better in the short run?