Contains:  Solar system body or event
4 hours 55 minutes timelapse of AR13421 in H-Alpha 5th of September 2023, Arne Danielsen

4 hours 55 minutes timelapse of AR13421 in H-Alpha 5th of September 2023

Acquisition type: Lucky imaging
4 hours 55 minutes timelapse of AR13421 in H-Alpha 5th of September 2023, Arne Danielsen

4 hours 55 minutes timelapse of AR13421 in H-Alpha 5th of September 2023

Acquisition type: Lucky imaging

Equipment

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Acquisition details

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Description

The time-lapse animation is created from 879 recordings between 07:12 and 12:07UT on September 5th 2023. Each recording was 18 seconds long with a framerate of 66 (1188 frames) and 2 seconds delay between each recording. 

The recordings where obtained using a using a iStar Asteria TCR 204-12 R35, with an Altair Astro 115mm TRIBAND H-Alpha D-ERF, Baader 35nm H-Alpha, Baader SunDancer II 3x Telecentric System TZ-3S, DayStar Quantum 0,4å PE and Player One Apollo-M Max mounted on a ZWO AM5 / Berlebach UNI 18 tripod and guided with Hinode SolarGuider.

The 200 best frames from each recording was stacked in AutoStakkert!3 before they were aligned, sharpened and contrast stretched in ImPPG. 

The animation was created in PIPP at 15fps effectively compressing the 4 hours 55 minutes of duration down to just 58 seconds.

This was the first proper test with the new 8" refractor in H-Alpha. The seeing was generally poor and not sufficient to take advantage of the aperture, but there were some periods in the second half of the timelapse that wasn't too bad. I also got lucky and caught an M2 flare from AR13421 at 08:12UT
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