UB 313: Larger than Pluto

For those interested: http://en.wikipedia.org/wiki/UB313

It sure has a wobbly orbit. From 97 AU to 37 AU. With a .44% eccentricity it’s more wobbly than Pluto. Notice too that part of it’s orbit is within the aphelion of Pluto.

I’m astounded that anything that far from the sun can still maintain an orbit. What if it’s just a passing body? Considering the distance it’s not impossible that it displays some of the characteristics of an orbiting body but may not actually be one.

It looks like a mushroom cap viewed from above.