Very accurate positions for Saturn's moons can be found at
JPL's HORIZONS System via their
Ephemeris Generator.
The observatory code for the old Durham observatory is 995.
A detailed discussion of motions of the Saturnian satellites can be
found in "Orbital Ephemerides of Satellites" by J.R.Rhohde and A Sinclair,
(Chapter 6,
Explanatory Supplement to the Astronomical Almanac).
Kerry Shetline's site
www.skyviewcafe.com has the java code for a saturn moons
applet.
Chapter 7 of "The Handbook of Astronomical Image Processing"
by Richard Berry and James Burnell is an excellent introduction to
astrometry. This book also contains very good general information
about the reduction of CCD data. A copy is available in the AstroLab
and in the University's Main Library
Christian Buil's CCD Astronomy is also another excellent book.
A copy is available in the AstroLab and in the University's Main Library