10th planet

A new planet recently discovered in our solar system by Dr Mike Brown and colleagues using the Samuel Oschin Telescope at Palomar Observatory.

Its name is still to be decided.

Also known as: Lila, Santa, Xena and 2003 UB313.

Gabrielle is the moon of 2003 UB313.


 * The discovery of 2003 UB313, the 10th planet


 * scientific paper (pdf)


 * How will the planetary status be decided?


 * 2003_EL61


 * Xena and other Extraordinary EKBOs

"Other code names have been "Santa" (2003 EL61), "Rudolph" (the moon of 2003 EL61), "Easterbunny" (2005 FY9) and "Flying Dutchman" (Sedna), and "Gabrielle" (the moon of 2003 UB313). We use these names internally simply because they are easier to say and remember than things like 2003 EL61 or S/2005 (2003 UB313) 1 . There is no chance whatsoever that these will become the permanent names of these objects!"