the results I got after last night got me thinking about the pointing models we all seem to use here with our mounts. The last days I routinely was able to get longer exposures (10 minutes) of most objects (example: the Veil nebula), no matter which filter I was using. But last night something happened, the stars were trailing and the images are unusable. But: I made no changes to the setup (other than rebooting the computer and powering on the motors again, with their autofind).
Look here:
So, now I am considering if either:
a) The Autofind somehow messed with the ability of the mount to track (sounds stupid to me)
Sequence did something wrong during the various MLPT runs (but it solved 4/4 and 3/4, so looks good to me)
c) something else changed (alright, the tube touched the roof as it closed down, but nothing strong)
I am a bit out of ideas right now. I know that my tube - or better, my main mirror - is moving a bit so that I have quite a bit of hysteresis, so that I simply cannot rely only on a complex pointing model, so i use MLPT and got really good results with it. I am using the GSC 1.1 (corrected) star catalog with Sequence, and it should work well (even if USNO A2.0 should be more precise). Hrm... I really dunno.
Question
lukepower
Hi dudes,
the results I got after last night got me thinking about the pointing models we all seem to use here with our mounts. The last days I routinely was able to get longer exposures (10 minutes) of most objects (example: the Veil nebula), no matter which filter I was using. But last night something happened, the stars were trailing and the images are unusable. But: I made no changes to the setup (other than rebooting the computer and powering on the motors again, with their autofind).
Look here:
So, now I am considering if either:
I am a bit out of ideas right now. I know that my tube - or better, my main mirror - is moving a bit so that I have quite a bit of hysteresis, so that I simply cannot rely only on a complex pointing model, so i use MLPT and got really good results with it. I am using the GSC 1.1 (corrected) star catalog with Sequence, and it should work well (even if USNO A2.0 should be more precise). Hrm... I really dunno.
All ideas are welcome
Thanks
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