Eris is more massive than Uranus.
Due to Eris's distant eccentric orbit, its surface temperature is estimated to vary between about 30 and 56 K (243
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

