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Sun Spot today!

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#1 dscarpa

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Posted 18 September 2019 - 12:09 PM

  It's near the edge, not very big and I don't see any activity around it but it is dark.  I'm using my SM 90 III with one etalon at 100X-145X.  So far only a few very small proms seen. David


Edited by dscarpa, 18 September 2019 - 12:11 PM.


#2 Stardust Dave

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Posted 18 September 2019 - 12:39 PM

E or W side of disk? 



#3 BeltofOrion

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Posted 18 September 2019 - 12:55 PM

Can't observe ... skies have been white for days ... but I did check this site which I find a very good one: https://tesis.lebede...n_pictures.html

So, are you referring to the dark area at 7 o'clock or the one up around 10 o'clock?


Edited by BeltofOrion, 18 September 2019 - 12:59 PM.


#4 dscarpa

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Posted 18 September 2019 - 01:49 PM

 At 9 it was on the left  east side of limb that's rotating out of view. Right after posting went back out and the spot was more spread out but still small and a lot lighter. Now at going on noon it's more of a convoluted area on the disk.  I've never seen such a short lived sunspot. Still no proms of note. David



#5 rigel123

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Posted 18 September 2019 - 01:57 PM

At 9 it was on the left  east side of limb that's rotating out of view. Right after posting went back out and the spot was more spread out but still small and a lot lighter. Now at going on noon it's more of a convoluted area on the disk.  I've never seen such a short lived sunspot. Still no proms of note. David


This was imaged at 12:25 EDT, can you determine what might represent the spot you saw? I'm wondering if you might have been witnessing a short lived prominence that would have appeared dark and then could have become the type of area you describe. I would not think an actual sunspot would disappear that quickly but I'm no expert! You can click on the image to see a much larger, detailed one. (East is left)

Full-Disk-Surface-9-18-2019.jpg

Edited by rigel123, 18 September 2019 - 01:59 PM.


#6 dscarpa

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Posted 18 September 2019 - 02:07 PM

 It's the spot on the upper left at about 10:30. It probably was a bright pop up prom that was on the disk.  I've seen some small intense ones on the limb and they don't last long. David


Edited by dscarpa, 18 September 2019 - 02:10 PM.


#7 MalVeauX

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Posted 18 September 2019 - 02:15 PM

If you look at a magnetic polarity view on SDO through the time ranges, you'll not notice a dipole anywhere.

 

I see black "holes" in HA pretty often at various image scales that are mostly little filaments or budding spicules, etc, that appear dark (cooler temps).

 

I took a peak of the photosphere with a 120mm aperture and couldn't find any hint of any pores or umbra. flowerred.gif undecided.gif

 

Very best,


Edited by MalVeauX, 18 September 2019 - 02:18 PM.


#8 rigel123

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Posted 18 September 2019 - 02:54 PM

It's the spot on the upper left at about 10:30. It probably was a bright pop up prom that was on the disk.  I've seen some small intense ones on the limb and they don't last long. David


I'm guessing the same!


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