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AR2741 & AR2740, Large Prominence | HA & CaK | May 14th 2019

Posted: Tue May 14, 2019 9:38 pm
by MalVeauX
Heya,

I had a strange day, where I went to work this morning for a little bit fully expecting bad weather per the report. On the way back home, it was suspiciously clear out. I carried on, ran some errands, etc, and it was still suspiciously clear. I just knew, the moment I even thought about taking a look, the clouds would roll in and it would storm. I'm convinced that the weather lords here in Florida definitely have something against my prying eyes into the sky. I tempted fate and went home. I peaked from the observatory, still no clouds. I got everything going and the seeing was just dreadful for my 8" options, I evaluated them a while until I was convinced there was no option to go 8" today. I was going to image at small scale and call it a day, thankful for a fairly clear sky still. Yet, still no clouds! So, I put my old 120mm F8 achromat on the saddle and let it take a look. Seeing supported this aperture nicely, so I figured, let's roll with it and see what happens. AR2741 was beautiful! And the large hedge prominence on the limb was just exploding with detail and was so wispy and full of strands. I grabbed data at two scales, to compare 80mm to 120mm in the same conditions.

B&W:

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Colored:

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Alternatives:

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Equipment:

Celestron Omni XLT 120mm F8.3 Achromat + Baader UV/IR Block Filter
Quark Chromosphere + 0.5x focal reducer + IMX174 (HA larger scale)

ST80 + Baader UV/IR Block Filter
Quark Chromosphere + IMX174 (HA smaller scale)

ST80 + Baader Blue CCD-IR Block Filter
PST CaK Filter + 2nd ERF + 3x Barlow + IMX174 (CaK)
Solarsetup_120mmF8_05142019.jpg
Solarsetup_120mmF8_05142019.jpg (51.34 KiB) Viewed 1308 times
Very best,

Re: AR2741 & AR2740, Large Prominence | HA & CaK | May 14th 2019

Posted: Tue May 14, 2019 11:13 pm
by RodAstro
Hi lovely images
The prom was very nice today I spent quite a while viewing it visually.

Rod

Re: AR2741 & AR2740, Large Prominence | HA & CaK | May 14th 2019

Posted: Wed May 15, 2019 1:55 am
by p_zetner
Lovely set, Marty.
Lots of detail in the closeup even though it’s “only” 120mm aperture!
Cheers.
Peter

Re: AR2741 & AR2740, Large Prominence | HA & CaK | May 14th 2019

Posted: Wed May 15, 2019 9:16 am
by Montana
These are gorgeous Marty :bow
Your story did make me smile though, so I am not the only one who does that then :lol: This happened to me on Sunday, forecast was clear blue all day. Started setting up, clear blue. Got everything just right and put my eye to the lens, darkness, where was the sun? looked up and a sky full of clouds. Where on earth did they appear from in 30 seconds? Thankfully after half hour of swearing they went away ;)

Alexandra

Re: AR2741 & AR2740, Large Prominence | HA & CaK | May 14th 2019

Posted: Wed May 15, 2019 2:38 pm
by ffellah
A great set, Marty ! All great but I particularly like #4, very fine detail in it...

Franco

Re: AR2741 & AR2740, Large Prominence | HA & CaK | May 14th 2019

Posted: Wed May 15, 2019 7:34 pm
by marktownley
Top set of images there Marty!