Accuracy of corr

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Gaetano Zarcone

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May 10, 2022, 2:48:05 AMMay 10
to astrometry, Dustin Lang
Hi Dustin, hello everyone
I have a doubt about the accuracy of the corr file. I know that in corr I find the star of the catalogue present in the FoV with their positions (x,y and ra,dec) and other. My questions are:
1)how much accurated are these positions? 
2) if I solve an image twice, can I improve this accuracy?
I don't know if these questions have a sense.
The catalogue used is Tycho 2
Thank you very much 

Leonardo Parisi

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May 12, 2022, 10:39:46 AMMay 12
to astrometry
as far as I know making it run twice improves the solution found.
But I leave the answer to the expert

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