Uncooperative Sun, so here's Sol on 2017-09-16

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Bruce Girrell
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Uncooperative Sun, so here's Sol on 2017-09-16

Post by Bruce Girrell » Sun Apr 01, 2018 6:56 pm

I've been dodging clouds all morning as they form out of nowhere seemingly every time I start a capture sequence.
So, while waiting for better seeing, I have been reprocessing.

Here's an old one I pulled up for reprocessing that happens to have both WL and Ha. I think the Ha came out really nicely. The WL isn't so impressive, but there's still some decent detail there.


Ha images are with a Lunt LS80THa single stack
WL is with a Celestron EdgeHD 8"
Capture was a QHY163M with SharpCap
13_14_31_Ha rework1.jpg
13_14_31_Ha rework1.jpg (2.89 MiB) Viewed 383 times
Sunspot WL.jpg
Sunspot WL.jpg (1.9 MiB) Viewed 383 times


Here is a little closer look at the action
These two are scaled identically and can be overlaid
Download the images and load them in an image viewer for best results
13_14_31_Ha crop 150.jpg
13_14_31_Ha crop 150.jpg (1.75 MiB) Viewed 383 times
13_14_31_WL crop 150.jpg
13_14_31_WL crop 150.jpg (1.49 MiB) Viewed 383 times

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ffellah
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Re: Uncooperative Sun, so here's Sol on 2017-09-16

Post by ffellah » Mon Apr 02, 2018 11:00 am

Great detail there, Bruce.

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marktownley
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Re: Uncooperative Sun, so here's Sol on 2017-09-16

Post by marktownley » Mon Apr 02, 2018 4:32 pm

Nice detail Bruce! Crank back the shutter time to avoid over exposure...
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Montana
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Re: Uncooperative Sun, so here's Sol on 2017-09-16

Post by Montana » Tue Apr 03, 2018 9:21 am

:lol: couldn't stop laughing about your cloud experience, I now have a permanent cloud over my head at all times, it is a sad ailment that solar astronomers catch which is very hard to get rid of ;)

Superb images though, lovely detail :hamster: :bow
Alexandra

Bruce Girrell
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Re: Uncooperative Sun, so here's Sol on 2017-09-16

Post by Bruce Girrell » Tue Apr 03, 2018 3:44 pm

Thanks Alexandra. I appreciate the sympathy
I live very near Lake Michigan, which is to my West and North, along with Lake Superior, to my Northwest. Prevailing winds from the North and West pick up moisture from the large lakes. The air is forced upward when it encounters the landforms, causing it to cool and causing water to condense. This causes us to be in a major "lake effect" snow region in the Winter, but what happens in warmer months is simply that clouds form spontaneously.

So I would look up at the sky... Clouds have cleared the Sun... No more clouds visible along the path of movement... Quick check of the computer and start the capture...
Only to find that in 30 seconds or so, a new cloud has formed and has started to pass in front of the Sun.
Stop capture...

The UK seems to be near a rather large body of water as well. I feel your pain

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