A mysterious ultraviolet star (Eduardo Schaberger Poupeau)

Contains: Solar system body or event

A mysterious ultraviolet star

Acquisition type: Lucky imaging

A mysterious ultraviolet star

Acquisition type: Lucky imaging

Photographing the sun in ultraviolet light has always fascinated me, since its appearance is very different from what we can see in other wavelengths. It looks like a completely cracked marble and on its surface we can see sunspots surrounded by thin glowing webs of magnetic froth bubbling around the active regions (plages).
Due to all these characteristics and the violet color that I used in post production to represent the photographed wavelength, our sun became a mysterious ultraviolet star.
In the photograph we can see 9 active regions, very close to the southeast limb appears AR3190, one of the largest sunspots that crossed the solar disk in this new cycle 25.

This photograph was taken on January 14, 2023

To obtain this photo, I captured multiple videos of 800 frames each for almost an hour and a half and then chose the one least affected by the turbulence of the atmosphere. From the best of these videos I stacked 115 frames with AutoStakkert and applied wavelets with Registax.
Final contrast and color adjustments were made using Photoshop.

Please note: The following tables are updated every 24 hours.

Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

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
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

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
Own remote observatory
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.
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.

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Astrometry.net job	n/a
PixInsight job	n/a
PixInsight queue size	n/a
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A mysterious ultraviolet star

A mysterious ultraviolet star

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Image Index:

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A mysterious ultraviolet star

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