"It is guaranteed bigger than Pluto," said Michael E. Brown, a professor of planetary astronomy at Caltech, who led the team that made the discovery. "Even if it were 100 percent reflective, it would be larger than Pluto. It can't be more than 100 percent reflective."
"A planet larger than Pluto has been discovered in the outlying regions of the solar system with the Samuel Oschin Telescope at Palomar Observatory, California Institute of Technology planetary scientist Mike Brown announced today."
Editor's note: This is a different KBO than the one mentioned below!
Editor's note: The discoverers of this object have a name but they have not released it. If you look at the end of this press release there is a link to a page Caltech. If you follow a link on that page about this discovery it has the name http://www.gps.caltech.edu/~mbrown/planetlila/index.html. So, is the name suggested for this planet "Lila"? Answer: it is the name of Mike Brown's newborn daughter.