Contact information

Skywarden,
Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki
taivaanvahti(at)ursa.fi

Ursa Astronomical Association

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Sun

25.5.2022 at 10.45 - 10.52 - Espoo (III)
Tommi Ropponen, Ursa (Etelä-Suomi)

For the second day in a row, most of the lunch break was sacrificed for filming. The weather was the same as yesterday, just fine, but there was something thin in the sky because the shutter speed had to be increased by 0.7 ms longer than yesterday. The images are mosaics, the leftmost of which is mirrored. Because the images are really fair in size (3600 x 4300 pixels) and because the Sky Guard is reducing these, full resolution images with explanations can be found here: https://www.astrobin.com/82ffjo/ https://www.astrobin.com/287ht0/

Images: 2 pcs

Sun

24.5.2022 at 11.25 - Espoo
Tommi Ropponen, Ursa (Etelä-Suomi)

Lunch break snapshots of the sun. The weather was just fine and if there had been time to shoot the animation material, the result would certainly have been spectacular. Of course, this is better than nothing :) More pictures and more detailed description details: https://www.astrobin.com/4855ir/

Images: 8 pcs • Comments: 1 pcs

Sun

19.5.2022 at 15.04 - 15.52 - Espoo (IV)
Tommi Ropponen, Ursa (Etelä-Suomi)

I wish these could be titled even with the model "Life of the Sun for 48 Minutes". So the material is a few videos showing what is happening in the chromosphere of the Sun at the wavelength of hydrogen alpha. A few smaller and one slightly larger eruption grabbed the cell during that 48 minutes. The four videos are all from the same material, but with slightly different treatments or coloring - some see things better than others. And finish with a bunch of still images from the biggest eruption phase. Full-size videos and pictures can be found on AstroBin (links below). The animations are fair...

Images: 8 pcs

Sun

16.5.2022 at 10.07 - 10.24 - Espoo (IV)
Tommi Ropponen, Ursa (Etelä-Suomi)

During the lunch break, the shots were better than yesterday. In the pictures, two different objects with several different processing (black photos in normal and inverted form, as well as color photos in post-processing with artistic color freedom :)

Images: 8 pcs

Sun

15.5.2022 at 10.22 - 10.32 - Espoo (III)
Tommi Ropponen, Ursa (Etelä-Suomi)

Sunny in windy weather and almost creepy seeing on display. However, modern equipment and software work wonders when more than 7,650 squares are recovered and the top 400 are stacked.

Images: 4 pcs

Sun

24.4.2022 at 10.41 - 11.07 - Espoo (III)
Tommi Ropponen, Ursa (Etelä-Suomi)

A quick description of the Sunday morning carriage. The weather was raw, cold and probably close to zero with the wind chill. Even the wind tore the equipment so that I was afraid the pipe would fall on the asphalt yard - next time I'll watch that little wind before I carry the stuff in the yard. The images and animations turned out to be quite good, although the sky wasn't entirely clear (this was mainly due to the fact that the shutter speed had to be increased by about 1 ms compared to the "proper" weather) and the wind waved the tube so that the subjects didn't move out of the ...

Images: 8 pcs

Sun

21.4.2022 at 10.49 - Espoo
Tommi Ropponen, Ursa (Etelä-Suomi)

I went on a coffee break to scrape the test material out of the yard. The aim of the description was to test what 12bit vs 8bit data looks like in the current case. As a result, here are a few final pictures. The wind was creepily strong for this grab & go system, but with transparency, the end result is pretty great. I wonder if this summer 2022 filming season is off to a good start. More information about the equipment can be spy on astrobin: https://www.astrobin.com/19krty/ Addition: Two more animations completed. In these, the sun has been photographed during the same shooting for 18 minut...

Images: 8 pcs • Comments: 3 pcs

Search result contains observations from time period 18.3.2022 klo 00.01 - 31.5.2022 klo 23.59.