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solar north, which way is up?

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#1 bill w

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Posted 07 April 2024 - 10:00 PM

any experts?



#2 BlueMoon

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Posted 07 April 2024 - 10:07 PM

The Sun rotational axis is tilted 7 degrees from the plane of the ecliptic as defined by the Earth's orbit around the Sun. I'm guessing that would qualify as solar north. Cheers.

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Edited by BlueMoon, 07 April 2024 - 10:12 PM.

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#3 drmdvl

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Posted 07 April 2024 - 10:10 PM

You can take a full disk test shot prior to partial phase and compare your sunspots to nasa's sunspot regions for the day which are always oriented with solar north up, then rotate your camera to match accordingly https://www.spacewea...ot-regions.html

 

Also, you can use Xaviers eclipse map and click on your viewing location - the little red hash on the solar disk is north from your viewing locations point of view.

http://xjubier.free.....0&Zoom=17&LC=1


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#4 bill w

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Posted 07 April 2024 - 10:12 PM

ok earth is tilted 23 degrees and it's spring

sun is tilted 7.5 degrees south towards us

so maybe 20-25 degrees?

eyeballing today's images over a few hours, looks like 35 degrees :(



#5 bill w

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Posted 07 April 2024 - 10:13 PM

excellent, thanks for your replies



#6 bill w

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Posted 07 April 2024 - 10:16 PM

 

Also, you can use Xaviers eclipse map and click on your viewing location - the little red hash on the solar disk is north from your viewing locations point of view.

http://xjubier.free.....0&Zoom=17&LC=1

hash mark seems to match what i measured, thanks

soho image is about 28 degrees

 

so 30 ish
 


Edited by bill w, 07 April 2024 - 10:56 PM.


#7 bill w

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Posted 07 April 2024 - 10:20 PM


Also, you can use Xaviers eclipse map and click on your viewing location - the little red hash on the solar disk is north from your viewing locations point of view.

http://xjubier.free.....0&Zoom=17&LC=1

err is the red hash relative to alt azm view or equatorial mount? it seems to change with different contact points
 





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