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Imaging through passing clouds: 10/12/2024

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#1 gstrumol

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Posted 12 October 2024 - 01:48 PM

The sky this morning was mostly sunny - except for those small clouds that kept passing across my FOV while filming! As it seemed like this was going to be a chronic condition, I resigned myself to take videos anyway and see what happens.

 

Oddly, imaging in Ha was the worst - I couldn't get any good images with the clouds and just trashed the lot. But WL seemed to have some promise: I could get sharp focus at times, although the clouds did provide for considerable variability in transparency wink.gif . In the end, it reduced to a purely WL session (of course, now that the sun is on the other side the sky is almost clear!).

 

Here is the FD taken with the AT80EDL and zoom EP set to near min magnification:

 

a1.jpg

(click to enlarge)

 

You can see the faculae around the rim; for comparison the SDO HMIIF picture is included.

 

Replacing the zoom EP with the double 2X Barlow assembly I got some zoomed-in images:

 

a2.jpg

(click to enlarge)

 

The constant cloud passings clearly affected the sharpness of the images, but not as bad as I feared.

 

EDIT: corrected name of sunspot group AR3855 (was incorrectly called AR 3853)

 

There were quite a few light bridges in groups AR3850, 3852 & 3854! AR3849, which appears to have a light bridge in a FD image, is simply 3 spots close together.


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#2 rigel123

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Posted 12 October 2024 - 08:44 PM

Good job dealing with those clouds


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#3 gstrumol

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Posted 12 October 2024 - 09:05 PM

Good job dealing with those clouds

Thanks Warren!

 

I couldn't catch a slot of 30s where there wasn't a passing cloud. Finally just gave up and took the ones with the least intrusion lol.gif


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