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Old 12-06-2015, 03:12 PM
Cimitar (Evan)
Evan Morris

Cimitar is offline
 
Join Date: Dec 2006
Location: Gunnedah, NSW
Posts: 250
Hi Andrew,

Quote:
What you would do after the drift aligning is select a bright star near the celestial equator and do a goto ( which will be off ). Manually centre the star using the Hbx keys and do a synch. That will reset the internal datums and you are now properly re aligned.
Thanks for this, makes perfect sense now. I think what may have contributed to my confusion is where the manual talks about high precision mode and manual star syncing. It says that it works well for that particular region of the sky, but if you move to a different part, another relevant local star sync may be required.

Quote:
Another approach that i use at times is to put my LX200 into polar home and spin the declutched RA axle until the stars make a circle in the EP, ie i am at perfect DEC = -90.
I then use my wedge controls to adjust the pointing until i can see the triangular asterism that marks the pole.
It just fits into the FOV of my 26mm EP, so centring the pole is pretty easy.
When that stays centred in the EP as i spin in RA, i know i am mechanically pointed at the pole.
After that, just do a polar one star align and just hit enter when it asks you to centre Sig Oct. Dont even bother to look.
Centre the second star correctly and you are done.
Perfect! I shall give this a try first up. I recently stumbled upon the 90 degrees OTA alignment issue 2 weeks ago. I conducted an RA field rotation and the SCP disappeared right out of the FOV and then slowly back in again. (the circle was quite wide). After some minor adjustments I was able to keep the SCP asterism stationary whilst everything else spun around it.

Cheers
Evan
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