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Old 14-05-2021, 09:52 AM
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Merlin66 (Ken)
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Solar activity 14 May 2021

At least there's less solid cloud but a very unsteady atmosphere.....
Only LW and CaK.
AR 2822 continues to impress, larger spot with penumbra and a few scattered small spots, AR2823 looks like a small "black hole" on the solar surface - very black with no penumbra.


I've tried an inverted CaK of AR 2822/2823 just for interest.
Enjoy!
(Hmmm the circular artifact which crept into the full disk CaK came back when uploaded to IIS!!!!! Re-done, re-saved and uploaded. Hopefully OK this time)
Attached Thumbnails
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Last edited by Merlin66; 14-05-2021 at 02:20 PM.
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Old 14-05-2021, 11:02 AM
PeterM
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Another fine collection Ken.
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Old 14-05-2021, 02:02 PM
Eris (Gerard)
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A very interesting set of images Ken excellent all round. I am particularly interested in your whole disc Ca K image featuring that unusual looking spot just off the eastern limb. Is it a real feature or a processing artefact?
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Old 14-05-2021, 02:22 PM
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Merlin66 (Ken)
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Gerard,
The original .tiff was clean but somewhere in the crop, colour process it crept in!
Saw it when I uploaded, deleted the image, redid it uploaded and......it came back!
Not sure what caused the glitch.
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Old 14-05-2021, 03:07 PM
Eris (Gerard)
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Thanks Ken. The reason why I ask is that on the latest SOHO Magnetogram there seems to be a series of faint circular features in that region which I wondered that one may have developed further from when that image was taken??? If it was real it would be a very unusual looking feature. If it is a processing glitch it would be interesting to find out how it happened after you took the trouble to clean it up.
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Old 14-05-2021, 03:21 PM
Eris (Gerard)
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Just had another look and it's gone. I presume that you have updated the image. Either that or I'm having an adverse affect to my medications. Sorry to bother you.
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Old 14-05-2021, 03:36 PM
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Merlin66 (Ken)
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Gerard,
Yes, updated!
As I said the original 30.6 Mb hi-res tiff showed no artifacts.
I think somewhere in reducing the image to jpeg and smaller size (<200Kb) for the forum, it crept in.....
Never seen it happen before????
Such is life!
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Old 14-05-2021, 05:24 PM
John W (John Wilkinson)
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Interesting set of images Ken - terrific detail. Thanks, John W.
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Old 14-05-2021, 05:38 PM
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Appreciated, John.
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