Eris is more massive than Pluto.
 In about 800 years, Eris will be closer to the Sun than Pluto for some time (see the graph at the left)
As of 2008, there were approximately forty known TNOs, most notably 2006 SQ372, 2000 OO67 and Sedna, that are currently closer to the Sun than Eris, even although their semimajor axis is larger than that of Eris (67

