Grouping AR2818, AR2820 & AR2821 & Discs | April 27th 2021

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MalVeauX
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Grouping AR2818, AR2820 & AR2821 & Discs | April 27th 2021

Post by MalVeauX »

Heya,

Well, it's been a hot minute for me, between horrible weather as summer comes in with storms and just a messy work schedule. Seeing has been horrible lately. I've done more visual than imaging the past 30+ days and today's the first day I've solar imaged in over 30 days due to weather here in Florida. Imagine that right? Sunny Florida. Pffft. Seeing was bad today, but it's the first clear evening I've had. I've had zero clear mornings when I was off, so today was a late attempt as seeing at least gets slightly better for me in my late evening before sunset, so today was around 18:30pm Eastern time for these captures. I was thinking I would totally miss imaging the great grouping of AR2818, AR2820 & AR2821 together, but at least got some data on them finally. Seeing was ranging from 1.2 arc-seconds to 4+ arc-seconds in waves, it was bad.

B&W:


Image

Image

Image

Image

Image


Colored:


Image

Image

Image

Image

Image


Equipment:

120mm F10 Refractor with internal sub-aperture D-ERF (2" Baader Red CCD-IR Block Filter)
+ PST etalon -> two 1.7A Blocking filters stacked -> ASI290MM camera (HA moderate resolution)
+ Two 1.7A Blocking filters stacked -> ASI290MM camera (Loose HA Photosphere showing the filament and other chromosphere features over the photosphere under it)

60mm F16.7 Refractor
+ Lunt CaK B1200 Module -> IMX253 camera (CaK Disc)
+ Baader Red CCD IR Block Filter + Baader ND 3.0 Filter -> IMX253 camera (Photosphere Disc)
Solarsetup_04272021.jpg
Solarsetup_04272021.jpg (154.93 KiB) Viewed 238 times
Very best,


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p_zetner
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Re: Grouping AR2818, AR2820 & AR2821 & Discs | April 27th 2021

Post by p_zetner »

An impressive series Marty, despite your seeing problems. The results are perfect at this image scale.
That off-band H alpha is very interesting.
Cheers.
Peter

Edit: Oh, I see from your equipment list that it’s actually wide-band not off-band. Really interesting.


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DeepSolar64
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Re: Grouping AR2818, AR2820 & AR2821 & Discs | April 27th 2021

Post by DeepSolar64 »

You did well Marty considering the seeing. Bad seeing is normal for me but it seems summer is a bit better than winter.

I wondered what had became of you...

James


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Re: Grouping AR2818, AR2820 & AR2821 & Discs | April 27th 2021

Post by MAURITS »

Lovely captures Marty.


Regards,
Maurits

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Re: Grouping AR2818, AR2820 & AR2821 & Discs | April 27th 2021

Post by ffellah »

These are excellent Marty, thank you for posting.

Franco


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Re: Grouping AR2818, AR2820 & AR2821 & Discs | April 27th 2021

Post by marktownley »

Always nice to see your images Marty!


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MalVeauX
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Re: Grouping AR2818, AR2820 & AR2821 & Discs | April 27th 2021

Post by MalVeauX »

Thanks all, :bow
p_zetner wrote: Wed Apr 28, 2021 12:30 am That off-band H alpha is very interesting.

Edit: Oh, I see from your equipment list that it’s actually wide-band not off-band. Really interesting.
Yes, it's wide-band, I wanted to see what would the view be like with two 1.7A filters stacked together behind a D-ERF on their own. I expected to see the photosphere, but there's chromosphere features showing up rather obviously with that dark filament showing through. Took me by surprise. Very interesting view I thought, so I kept it. I've imaged prominences with 6A bandpass HA filters, but apparently 1.7A stacked was enough to see a very bright filament like that and it correlated with the location in the images of the upper chromosphere when aligned. So, figured it was kind of neat, a merging of photosphere mostly with some chromosphere features.

Very best,


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Re: Grouping AR2818, AR2820 & AR2821 & Discs | April 27th 2021

Post by pedro »

Great images there Marty. I know what you mean, horrible weather here as well


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Re: Grouping AR2818, AR2820 & AR2821 & Discs | April 27th 2021

Post by Montana »

I did enjoy these, I'm glad you have a little sunshine :bow :hamster:

Alexandra


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