Category Archives: Uncategorized

Eddington epilogue

I was lucky to have ended up at this observing location with such excellent weather. When planning to view total eclipses, I am advised to arrange for other activities as well; the eclipse itself is subject to fickle viewing conditions … Continue reading

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Discussion

It is a bit disappointing to be unable to show a clear gravitational signal, even with all of the successful exposures that were taken, but I recognized the difficulty of this measurement early on. In addition to the variables I … Continue reading

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Analyzing Eclipse Day Results

I was able to obtain 35 photos during totality that were candidates to locate stars in the field. The exposures ranged from 1/60 to 2 seconds, but it became clear after applying the detection procedure starPos.m, that only the longest … Continue reading

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Comparing Before and During images, step EE-4

This was written prior to eclipse day as I was contemplating how to compare the two image sets.  I include it here to keep the thought sequence intact.   When we apply steps EE-1, 2, and 3 to both the … Continue reading

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Corona tangent

I encountered a report about the predicted corona and wondered how it would compare to what we actually saw.  I do not know the orientation of either the simulation or of my image (where is the solar north pole?).  Are these … Continue reading

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Eclipse Day!

The good weather held and we had zero clouds and negligible smoke for the eclipse.  Temperatures were climbing in the bright morning sun, but stalled and then dropped during the partial phases of the eclipse– enough that we donned our … Continue reading

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Step EE-3: Finding the best fit

We now have a way to transform the stars detected in an image into our virtual camera reference frame, but the previous step was just the “rough alignment” based on two bright stars. This is vulnerable to errors in how … Continue reading

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