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Sunspots 2715, 2714, 2713 | Major Proms | HA & CA | June 20th

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#1 MalVeauX


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Posted 20 June 2018 - 02:12 PM

Hey all,


Woke up to a hazy, but otherwise cloud-free sky at 7am. I went out to my observatory and prepared for some imaging as I checked GONG and AR2715 had grown significantly since yesterday from an active unnamed region to a large visible umbra and detailed pneumbra which is fantastic. Great prominence groupings too, a big "floater" hovering the limb. I gathered the data in 656.28nm & 393nm to compare wavelengths. The full disc is another mosaic that stitched together fairly well. The sunspot groupings and faculae are awesome in 393nm.




Celestron Omni XLT 120 Refractor

Orion ED80 Refractor (for 393nm full disc)

Orion ST80 Refractor (masked to 60mm F6.6) for 656.28nm Mosaic

Baader UV/IR Cut Filter (ERF for 656.28nm)

Baader B-CCD Blue Filter (ERF for 393nm)

Daystar Quark Chromosphere (656.28nm)

Skybender with 393nm filters

Orion Sirius Mount

ASI174MM Camera





AR2714 with some major proms:




The major proms on the limb:




New AR2715 in 393nm & 656.28nm:




AR2713 & AR2714 in 393nm:








Full Disc (Inverted) Mosaic (go to Flickr/Astrobin for full resolution)




Full Disc Mosaic (go to Flickr/Astrobin for full resolution)




Full Disc in 393nm for Comparison:







Today's gear:






Very best,

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#2 aneeg



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Posted 20 June 2018 - 02:18 PM

Only one word, Marty: Envy!



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#3 spereira


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Posted 20 June 2018 - 02:49 PM

Fantastic images, as usual, Marty!  I love the prominences - and I really love the Ca-K images!

Thanks very much for sharing!



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#4 rigel123



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Posted 20 June 2018 - 02:51 PM

Fantastic shots Marty!  I was only able to do a quick capture through some sucker holes but they were great for the few minutes I could see them!

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#5 David Knisely

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Posted 20 June 2018 - 05:13 PM

Nice shots!  I especially like the high resolution shots of the fine arch filament system inside the active region AR 2715.  One note however: there is not really a need to say "Sunspot AR2713", as that is misleading.  The area is called an "Active Region", which is the reason the "AR" is in front of the abbreviated NOAA Active Region number, so just saying AR followed by the number is enough.  In addition to features like filaments, fibrils, Ellerman Bombs, and plage, numbered Active Regions often contain more than one sunspot (the NOAA AR numbers are usually not assigned to a single sunspot).  Indeed, some older numbered Active Regions can contain no sunspots at all.  Clear skies to you.

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#6 Bob3137


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Posted 20 June 2018 - 06:13 PM

Very nice work Marty!

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#7 BYoesle


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Posted 21 June 2018 - 03:22 PM

Superb images Marty! bow.gif  And quite a bit of work, thanks for posting  waytogo.gif

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#8 sushi1128



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Posted 22 June 2018 - 06:35 AM

awesome images ! Marty.  Thanks for sharing

Edited by sushi1128, 22 June 2018 - 06:35 AM.

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