August 16th images, 396 nm, 300 mm solar scope, St Véran

christian viladrich · Post by **christian viladrich** » Tue Aug 17, 2021 3:32 pm

Hi,
Here are two images taken on August 16th.

Note the distorted granulation and intergranular bright points between the two pores :
http://astrosurf.com/viladrich/astro/so ... 96-5nm.jpg

This area appears as a plage in Ca K :
http://astrosurf.com/viladrich/astro/so ... 96-5nm.jpg

Clear skies !
Christian

EGRAY_OBSERVATORY · Post by **EGRAY_OBSERVATORY** » Tue Aug 17, 2021 4:51 pm

The 'Porridge' is quite amazing in your captures Christian

Thanks for sharing
Terry

Post by **Montana** » Wed Aug 18, 2021 6:08 am

are you sure you aren't at SDO on holiday

So smoooooth and sharp

Alexandra

Carbon60 · Post by **Carbon60** » Wed Aug 18, 2021 6:19 am

Absolutely remarkable images, Christian. Excellent seeing makes all the difference.

Stu.

Post by **marktownley** » Wed Aug 18, 2021 7:40 am

Amazing images Christian!

ffellah · Post by **ffellah** » Wed Aug 18, 2021 10:19 am

Incredibly good and sharp, Christian

Franco

LeoD · Post by **LeoD** » Wed Aug 18, 2021 5:45 pm

Looks ike IF grade gem - Image Flawless!
What a picture finesse to resolve clearly IBP's of the only 100-200km size on the Sun!
I have a pleasure to see all your last posts - a very productive August on St Véran.
Thanks for sharing
Leo

DeepSolar64 · Post by **DeepSolar64** » Thu Aug 19, 2021 4:37 am

I wonder if anyone has ever seen the intergranular bright points visually?, if so it would certainly take a large scope. The contrast is probably also quite low visually.

Christian, Have you ever tried to observe the granulation visually? If so, what can you see?

The images are simply stunning.

James

christian viladrich · Post by **christian viladrich** » Thu Aug 19, 2021 3:17 pm

Thanks guys !

James, I never used the 300 solar scope visually, or maybe once or twice for the very first tests. The minimum diameter to observe the bright intergranular points is about 250 mm. The contrast is larger than the granulation constrast. Still you need to observe in G-band (=430 nm, FWHM < 10 nm), or at 396 nm. So visually, the optimal would be a 250 mm scope and a G-band filter.
I don't know if any one has done this. This is pobably feasible.

Christian

August 16th images, 396 nm, 300 mm solar scope, St Véran

August 16th images, 396 nm, 300 mm solar scope, St Véran

Re: August 16th images, 396 nm, 300 mm solar scope, St Véran

Re: August 16th images, 396 nm, 300 mm solar scope, St Véran

Re: August 16th images, 396 nm, 300 mm solar scope, St Véran

Re: August 16th images, 396 nm, 300 mm solar scope, St Véran

Re: August 16th images, 396 nm, 300 mm solar scope, St Véran

Re: August 16th images, 396 nm, 300 mm solar scope, St Véran

Re: August 16th images, 396 nm, 300 mm solar scope, St Véran

Re: August 16th images, 396 nm, 300 mm solar scope, St Véran