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Old 30-06-2012, 09:27 AM
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silv (Annette)
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Join Date: Apr 2012
Location: Germany 54°N
Posts: 1,110
star trailing: used EQ5 with GotoStar

Up here in Auckland, yesterday evening was clear sky, at last.
5 hours I spent outside with my new used EQ5 mount, GoToStar and camera. unsuccessful. and not because of the moon.

-reasonable south-pole alignment with a compass on my iphone along the concrete slabs seam of the driveway,
-balancing okay,
-the bubble scale almost centered, the controller set up with NO DST, 720 hours ahead of UT, correct time, date and longitude, latitude
- 3 star alignment with Canopus (southwest), Antares (almost overhead) and ... ah, Arcturus (north) -
and then the camera still produces trailing stars.
The 3 stars all required 1 1/2 inch of correcting to the left and a bit down (or up?) to focus them after the mount had slewed to them.

Also, when choosing a star, afterwards, to GoTo slew to, I would always have to correct a fair amount; almost as much as during 3-star-alignment.

Doing several 3-star alignments, I noticed that the controller computes a different offset of error correction each time.
very different, each time.
As in a number difference of 100+ in 2 alignments (whatever they mean, these numbers.)
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