Sun in H-Alpha 25th of August 2022 - Timelapse of huge prominence (Arne Danielsen)

Contains: Solar system body or event

Sun in H-Alpha 25th of August 2022 - Timelapse of huge prominence

Acquisition type: Lucky imaging

Sun in H-Alpha 25th of August 2022 - Timelapse of huge prominence

Acquisition type: Lucky imaging

Time-lapse animation created from 487 recordings between 10:02 and 14:11UT on August 25th 2022. Each recording was 20 seconds long with a framerate of 30fps (600 frames) and a 10 seconds delay between each recording. The recordings where made using Coronado 60mm/BF15 w/Beloptik ITF, stopped down to 50mm, Baader 35nm H-Alpha and ZWO ASI 178mm, which gives a focal-length of 400mm and a sampling of 1.24" per pixel.

Everything was mounted on a Sky-Watcher SolarQuest AltAz mount.

The best (sharpest) 200 frames from each recording was stacked in AutoStakkert!3 before they were aligned, sharpened in ImPPG and contrast-stretched and blackened disk in Adobe Photshop.

The animation was created in PIPP at 20 fps effectively compressing the 4 hour 9 minutes of duration down to 22 seconds.

However, a few frames had to be tossed due to passing clouds making the animation jump at a few locations. The field rotation is because the sequence was recorded in AltAz mode.

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	Distinct awarded users	Total awarded images
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This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
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Star trails
Northern lights
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This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
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Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
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Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

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Astrometry.net job	n/a
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Sun in H-Alpha 25th of August 2022 - Timelapse of huge prominence

Sun in H-Alpha 25th of August 2022 - Timelapse of huge prominence

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Sun in H-Alpha 25th of August 2022 - Timelapse of huge prominence

Sun in H-Alpha 25th of August 2022 - Timelapse of huge prominence

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