Paulo,

> I'm finishing a new observatory with some friends, and hopefully we will
> have it ready in a few months, my setup (although there are others in the
> observatory) is a Televue NP101 and an ATIK16HR, I hope to have it remote
> in some months.

It will be hard to find objects in need of observations
with 10-cm of aperture. And 540mm of focal length
won't give too accurate astrometry either unless you
have very small pixels and good seeing. Even the
tiny 6.8 micron pixels from the ST10XME would
give you 2.6"/pixel which is a bit crude for good astrometry.

Everything brighter than V 19 gets picked up by the surveys
basically night after night after night. Objects in need of
targeted astrometry are usually V 19+... very hard for the
small refractor you mentioned and if possible at all
then only by stacking lots of frames in Astrometrica, so your
output will be something like 1-2 objects per hour plus the
other objects that happen to be in the field.

Comet searching might be an option with that refractor
(though something like f/2.8 or f/1.8 might be better than
f/5.4) if you have a huge CCD or you can use a DSLR.

Reiner