Henry Spencer wrote:

There has recently been speculation on theoretical grounds that there
might be some small asteroids with orbits well inside Mercury's,

After David Tholen's sighting some suggested that more apoheles are
likely to exist because Earth, Venus or Mercury have a scattering effect
that will occasionally place NEOs in smaller orbits. Is this the
speculation you're referring to?

--
Hop David
http://clowder.net/hop/index.html