In September 2006 it was reduced to a number--number 134340 in the catalog of minor planets
... Should 2003 UB313 be treated as any other 
minor planet, its discoverers will .... Pluto is now 134340 - Xena is now Eris 
National Geographic - September 16, 2006 Hubble Finds the 'Tenth Planet' is 
Slightly... [DOC] [TLE] Comets A to Z - British Astronomical Association [PAR] Comet C/2006 P1 (McNaught), Credit S. Deiries/European Southern Observatory 
..... 2003 UB313 proved to be slightly larger than Pluto (now numbered 134340).