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Astrometric resolution issue

Acquisition Plate Solving Astrometry Deep Sky
AstroBin Platform open discussions community forum •4 replies•59 views
patrick cartou avatar
patrick cartou avatar

Hi all

About my last update of this image https://app.astrobin.com/search?p=eJy7Ob0ktaLEVtXcSdXIqCwxpzQVSKsaO4JIEHIGkrmJJckZIZUFCClHHx%2B4bH5eTmVwamJRcoZnXkhmSU5qsWNeiktqcXJRZkFJZn5eMURXWmJOcaqquYtaflFKalFmXrqtbkFpUk5mcUZqilpBYnqqrSGYCs6sAjINDAA%2BvTEP&i=1o4dpk

I noted that the astrometric resolution was unprecise, it seams shifted upward…moreover, it’s easy to notice the “astrometric resolution shift” versus Version A.

How can I correct it ?

It’s the 1st time I note this issue…

Thank you in advance for your help.

Patrick

Steven Zuhoski avatar
Steven Zuhoski avatar

Looks like the main stars are in the center of the plate solver crosses. Nice capture.

Well written Respectful Supportive
patrick cartou avatar
patrick cartou avatar

Steven Zuhoski · Aug 22, 2026, 11:41 AM

Looks like the main stars are in the center of the plate solver crosses. Nice capture.

Thank you, Steven, for your comment. Practically, what can I do in this case ?

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Steven Zuhoski avatar
Steven Zuhoski avatar

Patrick,

I see what you mean. The stars and smaller objects seem to be aligned but other objects are way off like M16 and M17. I would submit a ticket request to investigate the problem. I do like the Version A mouseover because it is less cluttered than Version H.

Steve

It looks like the plate solver did not identify the stars correctly in Version H and that is causing the offset. The earlier versions have brighter stars that are easier for the plate solver to identify.

Helpful
patrick cartou avatar
patrick cartou avatar

Steven Zuhoski · Aug 22, 2026, 02:47 PM

Patrick,

I see what you mean. The stars and smaller objects seem to be aligned but other objects are way off like M16 and M17. I would submit a ticket request to investigate the problem. I do like the Version A mouseover because it is less cluttered than Version H.

Steve

It looks like the plate solver did not identify the stars correctly in Version H and that is causing the offset. The earlier versions have brighter stars that are easier for the plate solver to identify.

Steven

I thank you again for these technical explanations. I understand now…

CS

Patrick

Respectful Supportive