Sun in Ha - April 20, 2022 - ARs 2993/2994 (JDJ)

Contains: Solar system body or event

Sun in Ha - April 20, 2022 - ARs 2993/2994

Acquisition type: Lucky imaging

Sun in Ha - April 20, 2022 - ARs 2993/2994

Acquisition type: Lucky imaging

The Sun in H-alpha on April 20, 2022 featuring giant ARs 2993 and 2994.

Imaged with a Lunt LS50Tha (with feathertouch focuser and ZWO EAF), Lunt LS50C compact double stack filter, 2.5x Televue Powermate, ZWO ASI174MM. Imaging train was configured to give ~F/18. Image capture using Firecapture. Stacking in AutoStakkert3 (best 25% of 1000 frames). Full disk panorama generated from 2 sub images using Microsoft ICE. Processed in ImPPG (sharpening). Prom image generated from surface image using curves adjustment in ImPPG. Combined surface and prom images using GIMP.

Original version: Surface (Inverted) image combined with prom image

Rev B: Surface image combined with prom (inverted) image

Rev C: Prom image processed using IMPPG and Solar Live View

Final
Original
B
C

B

Description: Surface image combined with prom (inverted) image

Uploaded: ...

C

Description: Prom image processed using IMPPG and Solar Live View

Uploaded: ...

Cloudy Nights
Suburban Astrophotography
Sun in hydrogen 656 nm light
Solar System Imaging

Solar Imaging

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	Image of the day	Top pick	Top pick nominations	Total submitted
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	Image of the day	Top pick	Top pick nominations	Total submitted
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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.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
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.

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

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Sun in Ha - April 20, 2022 - ARs 2993/2994

Sun in Ha - April 20, 2022 - ARs 2993/2994

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Image Index:

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Sun in Ha - April 20, 2022 - ARs 2993/2994

Sun in Ha - April 20, 2022 - ARs 2993/2994

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B

C

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