Sun in Ha and CaK 7th December 2022

[Carbon60]

I've been almost completely absent from Solarchat recently with one thing or another; mostly through decorating the new extension at home, which has taken more time than expected. Thankfully, the work is almost complete.

Today the Sun came out in a beautiful blue sky and I just had to break off and take a few shots of the large active regions both close up and in context on full disk views. Days like today cannot be completely wasted on painting and papering

First up, Ca II K in mono and colour:

20221207_CaK_FD_Mono by Stuart Green, on Flickr

20221207_CaK_FD_Colour by Stuart Green, on Flickr

... and the same in H-alpha

20221207_Ha_FD_Mono by Stuart Green, on Flickr

20221207_Ha_FD_Colour by Stuart Green, on Flickr

There was a beautiful large prom visible in H-alpha in the south west

20221207_Ha_Prom by Stuart Green, on Flickr

...and here's the main active region AR13153

20221207_Ha_AR13153 by Stuart Green, on Flickr

It was so nice to have a break

Thanks for looking.

Stu.

[eroel]

Stu:
Beautiful images all of them.
Best regards.
Eric.

[DeepSolar64]

These are all excellent Stuart and thanks for giving me an excellent view of our star. I am under clouds again today with only a brief solar binocular view.

[marktownley]

These look excellent Stu, glad the building work is moving along.

[Montana]

Absolutely gorgeous
The hubby and I were chatting only the other night that you were very quiet and we guessed you would be busy decorating the house and getting it finished for Christmas what will you do next

Alexandra

[Carbon60]

Many thanks, Eric, James, Mark and Alexandra. Much appreciated.

[Carbon60]

Absolutely gorgeous
The hubby and I were chatting only the other night that you were very quiet and we guessed you would be busy decorating the house and getting it finished for Christmas what will you do next

Alexandra

Absolutely right, Alexandra. We've been working to get everything completed so that we can 'trim up' for Christmas. We managed to get the outside lights up a couple of days ago (Julie insisted on that ), and this weekend we'll get the trees sorted and the other paraphernalia that goes along with them. As for the house itself, we'll be busy doing a bit of landscaping when the weather warms up a bit. I still have a few odd jobs to do indoors to stop me from getting too comfortable

Stu.

[Martin_S]

Great imaging Stu, the Cak looks really crisp.

[ffellah]

Splendid images, Stu ! Agree with Martin, the CaK is very sharp and detailed. The Ha is great too.

Franco

[MAURITS]

Excellent images Stu, with detailed calcium images.

[DeepSolar64]

Excellent images Stu, with detailed calcium images.

Yep, I love Stu's CaK images!

[SJohnson]

WOW!! Fantastic work and very worth the break from painting and papering!!

[TareqPhoto]

I keep trying to find out what Ca K do you use and what scope/camera also?

[Bill_C]

Very nice Stu

[rigel123]

Awesome images Stu!

[arnedanielsen]

Lovely images, Stu!

Best regards,
Arne

[Carbon60]

Many thanks, guys.

Stu.

[Carbon60]

I keep trying to find out what Ca K do you use and what scope/camera also?

Hi Tareq,
I thought I’d answered this previously. Maybe it was someone else asking the same question.

I use a Lunt CaK module (straight through 2” B1800) with an additional narrowband filter set inside the module (Omega CaK filter). Unfortunately, I don’t think these are available anymore (someone might correct me on this). The module is used on a simple 72 mm f6 ED refractor https://www.skyatnightmagazine.com/rev ... refractor/. I use a mask to reduce the aperture to close to 43 mm giving f10 at the filter. The B1800 is a bit of overkill given the focal length of the scope, but I also use this filter on other scopes.

A 2.7 x Barlow is used at the eyepiece to provide an enlarged image onto the sensor of a Basler acA2440-75um camera. The final image is a mosaic of four quadrants.

Hope this helps.

Stu.

[Averton]

Beautiful images and great detail Stu.

[Rusted]

From painter to fine [solar] artist.

[TareqPhoto]

I keep trying to find out what Ca K do you use and what scope/camera also?

Hi Tareq,
I thought I’d answered this previously. Maybe it was someone else asking the same question.

I use a Lunt CaK module (straight through 2” B1800) with an additional narrowband filter set inside the module (Omega CaK filter). Unfortunately, I don’t think these are available anymore (someone might correct me on this). The module is used on a simple 72 mm f6 ED refractor https://www.skyatnightmagazine.com/rev ... refractor/. I use a mask to reduce the aperture to close to 43 mm giving f10 at the filter. The B1800 is a bit of overkill given the focal length of the scope, but I also use this filter on other scopes.

A 2.7 x Barlow is used at the eyepiece to provide an enlarged image onto the sensor of a Basler acA2440-75um camera. The final image is a mosaic of four quadrants.

Hope this helps.

Stu.

Stu,

First, thank you very very much for answering me

Second, i can't remember if i asked you before or not, maybe yes then i forgot, maybe not then someone else asked and i voted to them, we will keep asking as long you are doing great all the time, well done.

I ordered this module as well last month, but due to not being in stock so i have to wait, it will take 2-3 weeks, now i believe almost 2 weeks passed and i am still waiting and i can wait, i ordered B1200 after i asked about which module, it is also straight thru type, i can't wait to get it, but you gave me an idea about using an extra/additional filter because i do have CaK or K-Line filter i bought earlier this year, that could be good who knows, or i buy a bit wider band UV/CaK/K-line so i don't block much for CaK module.

[MapleRidge]

These are superb Stu...excellent work

Brian