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Hi Granny,

"Xena" is not it's official name - that's still to be decided.

It's 2003 UB 313.
I see Achernar's already given you link ... if you want to erect chart with this one, then when you next visit astro.com and extended charts, you'll find a numerical reference (999001) to type in box for asteroids etc at bottom of page.

Best wishes,
TS