Full disk 24-02-2021

[rsfoto]

Hi,

Again a Sunny day but with very uniform thin and high clouds but imaging no problem. A little bit of a breeze.

Here are the discs. AR 12805 is vanishing but AR 12804 is going strong. The three pores of yesterday are just one today near the meridian at ~ +22° and ~-2°and insterad of it in H-alpha there is a huge surface perturbation.

The hedge prom and the neighbouring one have brigded and built a huge single promince in the Southwestern limb. Difficult to appreciate.

As always best seen in full original size (2280x2280 pixels) in a new tab/window

[dhkaiser]

What is happening with those proms, wow!

[marktownley]

Very good indeed Rainer! The good weather we have forecast for the weekend is still forecast, i'm hoping to catch the activity before it passes over the limb.

[DeepSolar64]

Rainer, you have got it all in stunning resolution!

[Carbon60]

Looking good there, Rainer. That southern prom looks spectacular.

Hoping to see this for myself over the next day or two.

Stu.

[JochenM]

Very nice prom indeed.

The Sun is having a long weekend here; hopefully to return at the beginning of the week

[DeepSolar64]

I am envious of your filaments.

[Montana]

Wow!! these are terrific Rainer the prom has evolved a bit more today

Alexandra

[H-Alpha]

Amazing photos and resolution Rainer!!! Congratulations!

Since I am very new here (just two days), may I ask what telescope, filters and camera were used for these results and what processing (mostly frames taken and used)?

Alexandros

[rsfoto]

Amazing photos and resolution Rainer!!! Congratulations!

Since I am very new here (just two days), may I ask what telescope, filters and camera were used for these results and what processing (mostly frames taken and used)?

Alexandros

Hi Alexandros,

For H-alpha I use a Takahashi FSQ 85ED with a double stacked original Coronado (not Meade) SM 60 filter with a BF30 and an old fashioned Lumenera Infinity 2-2M. The H-alpha etalon adjustment is motorized and so easily tunable remotely while looking on the Monitor while acquiring the videos.

The discs are a mosaic of 9 single images. The speed of the camera is only 16 frames per second and I make 480 frames per video in AVI format. Prodess them in AviStack 2.0 and the rest is assembling in Photoshop like a bit of Histogram tuning usings Levels and a delicate Unsharp mask. I use all 480 frames.

The White Light image is a Mosaic of 4 single images and I use a Takahashi FS-78 with a very old Baader Herschel-wedge and a ZWO ASI 290MM Cool camera.

As the ASI 290MM Cool is a fast camera giving me 82 frames per second I take 1000 frames and process the same as H-alpha except no Unsharp mask at all. I use all frames with a brightness over 99.5%.

[H-Alpha]

Thanks a lot Rainer for the very detailed answer! Beautiful equipment.

I have not heard about a remotely tunable H-alpha etalon so far (just because I am new). Very interesting.

I am waiting for my ASI290MM (but not Cool) next week for my first real steps in White Light (although with a very old C8...), so you give me hope on the improvement I am waiting to see in comparison with the Canon DSLR, just from the camera. I know the C8 will be difficult to handle, until I get a proper and lower aperture solarscope.

Thanks once more,

Alexandros

[Stardust5858]

Lovely captures Rainer, I imaged today but not processed them yet. An amazing sunspot today.

[rsfoto]

Thanks a lot Rainer for the very detailed answer! Beautiful equipment.

I have not heard about a remotely tunable H-alpha etalon so far (just because I am new). Very interesting.

I am waiting for my ASI290MM (but not Cool) next week for my first real steps in White Light (although with a very old C8...), so you give me hope on the improvement I am waiting to see in comparison with the Canon DSLR, just from the camera. I know the C8 will be difficult to handle, until I get a proper and lower aperture solarscope.

Thanks once more,

Alexandros

Hi Alexandros,

Here in this topic in this forum, starts with message #8 from top to bottom you can see how I motorized my etalons with stepper motors.

viewtopic.php?f=9&t=26907