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Resetting a StarSense after polar align

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#1 Seeker999

Seeker999

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Posted 23 February 2021 - 03:18 PM

Good day

 

I use a StarSense unit on my CGEM mount to do a manual plus a polar align.

 

So I would start with the index markings, point to 5 positions in the sky and have them captured.  I would then add two more alignment positions.

 

Then I do a polar align and move my mount with the knobs as required.

 

The HC then shows a message that one should align once again but I am not sure what is the best way to first reset / delete the previous alignment data.

 

Up to now I have just switched the mount off an on again but that is not ideal.  Any suggestions how to clear out the memory completely and start fresh?



#2 robbieg147

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Posted 23 February 2021 - 03:54 PM

Are you doing a manual align because you have a poor view of the sky?

 

If you have a good view of the sky just do a normal auto Starsense align, if you can see Polaris don't do a ASPA, either use the Polemaster or Sharpcap just a few minutes.

 

If you have to use ASPA because you cannot see Polaris, just start a new Starsense alignment from the home position, no need to reset anything or turn the mount off.

 

When I use Starsense I never add additional alignment points just a waste of time, most objects are dead centre. Though if using ASPA there may be some merit in adding points?

 

Time is precious I would only do a ASPA as a last resort, also this needs to be repeated several times to get good accuracy. Standalone guiders like MGEN can give you a pretty quick PA though have never used mine for this so can't say how well it works?



#3 deansjc

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Posted 23 February 2021 - 04:44 PM

The above guidance is good.  However, the scope knows where it is pointing after the ASPA routine, so that isn't even a need to return the scope to the home position to commence the second alignment.

 

However, achieving a very good PA via the ASPA routine requires 2 iterations of the PA routine, and yes, each PA is followed by an alignment.

 

(So, I added more effort than I reduced, however achieving a very good PA is required for AP.  (That and usually more :-)



#4 Seeker999

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Posted 24 February 2021 - 09:54 AM

Are you doing a manual align because you have a poor view of the sky?

 

If you have a good view of the sky just do a normal auto Starsense align, if you can see Polaris don't do a ASPA, either use the Polemaster or Sharpcap just a few minutes.

 

If you have to use ASPA because you cannot see Polaris, just start a new Starsense alignment from the home position, no need to reset anything or turn the mount off.

 

When I use Starsense I never add additional alignment points just a waste of time, most objects are dead centre. Though if using ASPA there may be some merit in adding points?

 

Time is precious I would only do a ASPA as a last resort, also this needs to be repeated several times to get good accuracy. Standalone guiders like MGEN can give you a pretty quick PA though have never used mine for this so can't say how well it works?

Yes, unfortunately I have a poor view of the sky, so I can't do an Auto Align with the StarSense but I do have a good view of the ecliptic.

 

I live in the southern hemisphere and I don't have a clear view of the south celestial pole either.




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