Nope. It's a celestial body discovered a few years back beyond the orbit of Pluto. A planetoid. Before the recent redefintion, you could have considered it Planet 9.5 :-)

http://msnbc.msn.com/id/4533039/




>Isn't Sedna the name of some moon for one of the outer planets? Pluto is no longer a planet - it's like a Planetiod (or something) now.
>
>>Interesting! Never heard of that one!
>>
>>>>Sedna....
>>>
>>>This is another definition of Sedna. :)
>>>
>>>http://en.wikipedia.org/wiki/Sedna_%28Ireland%29