Follow up on Sunspot AR3062 - Eruption Confirmed

As a follow on the eruption of Sunspot AR3062 - see this link - I used data from SDO (Solar Dynamics Observatory - https://www.poollicht.be/nl/zonneactiviteit/zonnebeelden/sdo.html).

On the images from AIA 193, 211 and 304 the eruption is very easily to see (UT17h17). This confirms and verifies my picture. Cool!

Sunspot AR3062 Eruption

 

This evening Sunspot AR3062 near the south-western limb was observed during an eruption (UT17h17). Not sure what kind of eruption and will investigate further. 

Sun H-Alpha

The Sun in H-Alpha this evening. At the center of the disk sunspotgroup AR3068 is still growing and near the eastern limb the active region AR3070 can be observed with prominences. 

Picture taken using SharpCap 4, with flats and seeingmonitor. Stacking done by keeping 5% of the best frames.

Setting: SolarMaxIII 70/400 f/5.7 DS BF15 with ASI290MM

Software: SharpCap4, AS3!, IMPPG, CS4

Hercules Globular Cluster Messier M13

Globular Star Cluster, Messier M13, is located in constellation Hercules and about 25.000 ly away from Earth.

Setting : Nikon D7500, TAL200K f/8.5, ISO640 and exposure time of 34x30s 

Use of darks, bias, flats and darkflats

Software : APP, CS4 and DeNoise AI

Caution!

Art - Star Vega and Tri-Bahtinov

 

Looks like art but in reality it is the bright star and a Tri-Bahtinov Mask.

Tri-Bahtinov Mask - First Light

While using a "normal" Bahtinov mask for a long time, I was wondering what about an upgrade and using a Tri-Bahtinov mask. 

I read about the use of a Tri-Bahtinov mask on the website from Joost Drogenberg. Using the Bathinov Mask Drawing Generator - https://satakagi.github.io/tribahtinovWebApps/Tri-Bahtinov.html - I was able to prepare one for my TAL200K f/8.5 telescope. A local company did the lasercutting work based on the svg file. 

This evening I did a comparison test  between both Bahtinov masks on the bright star Vega. With the normal Bahtinov, the centerline is good centered and thus in focus. Using the Tr-Bahtinov mask I get 6 groups of spikes each containing 3 lines. The principle is the same as before: make sure the centerline of each spike group is positioned in the center. According to some forums, the use of tri-bahtinov masks is made for Schmidt Cassegrain scopes to collimate for all axes.