Monday Sun 31st May 2021

[Carbon60]

Another beautiful day here (our run of good weather won't last) so I took advantage and imaged across the spectrum at various image scales with my main focus being on AR2827.

The conditions were not ideal (they rarely are), but the seeing at times was boiling. A lot of data ended up in the bin, especially some of the closer views.

20210531_CaK_FD_40mm_Mono by Stuart Green, on Flickr

20210531_CaK_FD_40mm_colour by Stuart Green, on Flickr

I decided to have another go at Ha FD mosaics, so here's my effort on the Lunt 60 with 2.5x PM (6 panes). It's just so difficult to get an even view across the field in these. Look closer and you'll see some changes in apparent resolution as the conditions were so variable this morning.

20210531_Ha_FD_Mono by Stuart Green, on Flickr

20210531_Ha_FD_Colour by Stuart Green, on Flickr

Here's a closer view of a prom from departing AR2824, as it continues around the limb.

20210531_Ha_AR2824_Prom by Stuart Green, on Flickr

....and the main event, AR2827 in three lights (at different image scales)

540nm Continuum (Lacerta Wedge)

20210531_WL2_AR2827 by Stuart Green, on Flickr

Hydrogen Alpha

20210531_Ha_AR2827 by Stuart Green, on Flickr

20210531_Ha_AR2827_colour by Stuart Green, on Flickr

and Ca II K (Lunt B600)

20210531_CaK_AR2827_Mono by Stuart Green, on Flickr

20210531_CaK_AR2827_colour by Stuart Green, on Flickr

As always, thank you for looking.

Stu.

[H-Alpha]

Thnaks for sharing Stuart!
Very beautiful images despite your seeing and I very much liked the set of the main event.
What magnification did you use for it?
It seems my old Barlow is bad, since I can get no nice images with it. I am waiting for an FFC, but it seems it won't be available before August...
Best wishes,
Alexandros

[AJamesB]

Great shots, really love the h-alpha of AR2827, great detail and processing!

[EGRAY_OBSERVATORY]

Excellent captures Stu and the prom has come out so well too..

Thanks vm
Terry

[eroel]

Stu:
A very fruitful session in spite of boiling seeing.
Nicely processed images.
Best regards,
Eric.

[DeepSolar64]

You had a really good catch here Stu. All are great but my favorites are the colored full disc CaK and Ha images.

James

[Carbon60]

Thnaks for sharing Stuart!
Very beautiful images despite your seeing and I very much liked the set of the main event.
What magnification did you use for it?
It seems my old Barlow is bad, since I can get no nice images with it. I am waiting for an FFC, but it seems it won't be available before August...
Best wishes,
Alexandros

Hi Alexandros,

For the Ha images I used my 150mm/DS Lunt 35 mod with a 2.5x PowerMate and a Basler acA1920-155um camera. The apparent focal ratio is f34.

Stu.

[Carbon60]

Many thanks everyone. I think tomorrow might be the last fine day for a while.

Stu.