J. Forster wrote:
That's the point I was making earlier.
Most telescopes have a FOV of at least 15 arc-minutes. You only need to
get the guide stars into the field and go from there.
Also, a telescope's pointing can be off in BOTH RA and Dec. Dec has
nothing to do with siderial time.
If the axes arent exactly orthogonal or the polar axis (assuming an
equatorial mount) then the declination as measured by the telescope
encoder is dependent on time.
-John
If the mount is alt-alt altazimuth etc then both axis coorrdinates are
time dependent.
An automated telescope doesn't always have an observer available to do
the fine pointing corrections.
Since there has been no statement about the telescope aperture or field
of view the assumption that the FOV is 15 arc minutes or more may be
invalid.
Bruce
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