A couple of weeks ago I found another rather faint, distant comet,
the second for the year. The initial orbit was essentially indeterminate,
and not until today was enough astrometry available to establish it well.
The details on the orbit (but not the discovery) are here:

http://cfa-www.harvard.edu/mpec/K05/K05T76.html

...which includes hitherto unlinked prediscovery data over a two-month arc
from autumn 2004 by Spacewatch and from the Lowell 'Deep Ecliptic Survey' being
conducted with the 3.8-m Mayall telescope at Kitt Peak. We looked at the
Kitt Peak images this afternoon, and while the object does look cometary,
it was relatively subtle, so Marc Buie, who actually examined the images,
missed his chance at "immortality".
The interesting thing is the orbit: a relatively circular one somewhat
inside Saturn, but with enough eccentricity that it goes out just tangent to
Saturn's orbit. The suspicion is that unless it is in a special resonance that
keeps it away from the planet, then it must have some close encounters,
and thus the orbit is unstable over the long term.
You can get an idea of the scale things by playing with the JPL
orbit-diagram toy here:

http://neo.jpl.nasa.gov/cgi-bin/db_shm?sstr=P%2F2005+S2

The available astrometry includes data taken with a 30cm SCT, so it's
not totally beyond the reach of amateurs with a CCD.

\Brian