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Orientation of Helmet streamers

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#1 chvvkumar

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Posted 19 February 2024 - 06:21 PM

Is it possible to predict what orientation the streamers will be on the day of the eclipse? The purpose of asking is to make sure the long axis of my camera sensor is aligned to them beforehand.

 

Thank you!



#2 Daniel Dance

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Posted 20 February 2024 - 04:30 PM

Don't they have real time images of the solar corona, etc... from SOHO??

 

 

https://www.esa.int/...e_Sun_from_SOHO


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#3 foxwoodastronomy

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Posted 20 February 2024 - 05:05 PM

chvvkumar.

You are asking a great question, but it has a few layers of answers.

First, there is a company called Predictive Sciences that may release their corona prediction for 2024 soon.  I haven't see it yet.  I have attached a page from my book that shows what they predicted in 2017 compared to my actual image from 2017.

Second, we are going to be a solar maximum in 2024 and generally the corona will be more symmetric around the Sun.  It is less likely to have a very long odd-ball long streamer somewhere.  In non-solar-maximum eclipses, generally but not always, the longest streamers are in line with the equator of the Sun, so that is how you want to align your sensor.

Third, you want to align your sensor with it's long axis in line with the solar equator anyway so you can match your Baily's beads images with the predicted appearance of the bead for you location.  The predictions from Xavier Jubier are amazing  That's fun to do.  The second image is also from my book.

Hope that helps, Gordon

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#4 chvvkumar

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Posted 20 February 2024 - 05:12 PM

Don't they have real time images of the solar corona, etc... from SOHO??

 

 

https://www.esa.int/...e_Sun_from_SOHO

 

I did check SOHO but I am not sure if there is a place to see what orientation the Sun is in the imagery. But it will be a good resource to check on Eclipse day to see what kind of shape the streamers might take. Thank you!

 

chvvkumar.

You are asking a great question, but it has a few layers of answers.

First, there is a company called Predictive Sciences that may release their corona prediction for 2024 soon.  I haven't see it yet.  I have attached a page from my book that shows what they predicted in 2017 compared to my actual image from 2017.

Second, we are going to be a solar maximum in 2024 and generally the corona will be more symmetric around the Sun.  It is less likely to have a very long odd-ball long streamer somewhere.  In non-solar-maximum eclipses, generally but not always, the longest streamers are in line with the equator of the Sun, so that is how you want to align your sensor.

Third, you want to align your sensor with it's long axis in line with the solar equator anyway so you can match your Baily's beads images with the predicted appearance of the bead for you location.  The predictions from Xavier Jubier are amazing  That's fun to do.  The second image is also from my book.

Hope that helps, Gordon

Very good points as always, Gordon! I have just purchased your book, I'll make sure I read it this weekend!





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