Sun in Ha - April 8, 2022 - Arch Prom (JDJ)

Contains: Solar system body or event

Sun in Ha - April 8, 2022 - Arch Prom

Acquisition type: Lucky imaging

Sun in Ha - April 8, 2022 - Arch Prom

Acquisition type: Lucky imaging

The Sun in H-alpha on April 8, 2022 featuring a really nice arch prominence.

Imaged with a Lunt LS50Tha (with feathertouch focuser and ZWO EAF), Lunt LS50C compact double stack filter, 2.5x Televue Powermate, ZWO ASI290MM. Imaging train was configured to give ~F/18. Image capture using Firecapture. Stacking in AutoStakkert3 (best 25% of 1000 frames). Processed in ImPPG (sharpening). Prom image generated from surface image using tone curves adjustment in ImPPG. Colorized using Solar Live View.

Original version: Prominence image processed using ImPPG and Solar Live View. Playing around with ImPPG I figured out how to use tone curve adjustments to bring out proms from a standard 'surface' aka chromosphere image.

Rev B: Prominence image processed using ImPPG. Playing around with ImPPG I also figured out how to black out the disk. I've seen some great images that appear to use this technique but wasn't able to re-create the effect until now.

Rev C: Prominence image shot using typical long exposure approach and sharpened in Registax6. This is my standard approach for generating prom images.

Final
Original
B
C

B

Title: Prominence image processed using ImPPG (tone curves adjusted to bring out prom and black out solar disk)

Uploaded: ...

C

Title: Prominence image shot using typical long exposure approach and sharpened in Registax6

Uploaded: ...

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

Solar Imaging

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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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Sun in Ha - April 8, 2022 - Arch Prom

Sun in Ha - April 8, 2022 - Arch Prom

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Sun in Ha - April 8, 2022 - Arch Prom

Sun in Ha - April 8, 2022 - Arch Prom

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