text: what is the name of 10 th planet which is identified recently?   when a new object is discovered the international astronomical union (iau) gives it a temporary designation based on the date it was first seen. thus 2003 ub313 can be decoded to tell you that the data from which the object was discovered was obtained in the second half of october 2003. next, depending on what the object is, the discoverers propose a certain type of permanent name.  the planet's temporary name is 2003 ub313. the name "xena" is frequently heard associated with this planet; this name comes from an internal cod name that we used before we publically announced the existence of the planet. 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! as soon as the committees make their decisions these objects will get real names.