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Ursa Astronomical Association
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Ursa Astronomical Association

Sun - 25.6.2022 at 09.36 - 25.6.2022 at 10.17 Espoo Observation number 107359

Visibility III / V

Tommi Ropponen, Ursa (Etelä-Suomi)

Sunbathing on the wavelength of hydrogen alpha this morning. There was a thin cloud in the sky, which meant that the shutter speed had to be slightly increased compared to normal. However, Seeing was nice and calm in the morning, so the final pictures and animations turned out pretty good.

The intention was to take videos for about an hour to stack the animations, so I would record 20 seconds of data and then take a break of about 30 seconds & repeat this sequence in between, refining as needed. However, I sighed a bit in a hurry and only finally realized that I was capturing the video for 45 seconds with 30-second breaks. As a result, the laptop ran out of disk space after about 41 minutes of data collection (a 500 gigabyte disk), so things ran out of it that day.

However, I compiled these animations inverted and "normal" and colored with artistic freedom. In addition, perhaps a collection of images stacked from the best video with different processing is still the final cassette.

Full-size images and videos can be found on AstroBin:

Additional information
  • Observation target
    • Sun
  • Seeing
    • Good
Technical information

Traditional set i.e. Baader 110mm D-ERF, Altair Astro Starwave 102mm f / 7 fpl-51 doublet, Daystar Quark chromosphere, Rowan astro T2 tilt and ZWO ASI174mm camera.

27 videos were captured (just over 16 GB per video). In each video, about 7,100 frames, and the top 400 of these, are stacked toward the final frame of the animations (and stills). Data was captured at about 157 fps with Firecapture and stacked in Autostakkert, twisted with ImPPG, and the final catheters pulled in Photoshop.

Comments: 2 pcs
Tarja Hämäläinen - 26.6.2022 at 15.00 Report this

En ole koskaan aiemmin nähnyt näin   upeita ja hienoja kuvia  auringosta

Tommi Ropponen - 26.6.2022 at 19.38 Report this

Kiitos Tarja! Tänä kesänä on saatu vermeet hyvään iskuun, joten näitä on nyt helppo kuvata ja prosessoida. Mukavaa, että jälki kelpaa muillekin :)

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