==Mass?== 
 It says the mass is 0.5 Solar Masses and it's radius is 0.42 solar masses. Then it's shown it is the same size as Neptune. So what is this planet's mass? 0.5Ms would make it a star...  212.201.74.49 (3 February 2013) 
 :You are confusing the mass of the "Parent star" with the mass of the planet (~22 Earth mass).