4 Times the size of Jupiter, with moons. It will take "2 years" to analyze all date... hmmmm
http://gizmodo.com/#!5759865/the-mystery-of-the-giant-planet-hidden-in-our-solar-system
http://www.huffingtonpost.com/2011/02/14/tyche-hidden-planet_n_823028.html
http://astrowright.wordpress.com/2010/04/30/solar-systems-planet-x-returns/