[FPSPACE] a KBO bigger than Pluto...

[Keith Gottschalk]

Surely the decades of sunspot photos would have picked it up? A body
like that could never avoid transits of the sun.

>>>What I'm now wonderering is is there a Mercury-sized body unspotted
inside
Mercury's orbit because it's too close to the Sun to distinguish and/or
its
orbit has such a high inclination no one has looked.  Too bad the
Ulysses
probe doesn't have a camera.  I wonder what the astrophysicists have
determined about the limits of such a hypothetical body, given our
observations of the motion of the known planets.