Saturn 2018 to 2021 (Niall MacNeill)

Contains: Solar system body or event

Saturn 2018 to 2021

Acquisition type: Lucky imaging

Saturn 2018 to 2021

Acquisition type: Lucky imaging

I put together this montage & GIF animation of the changes in Saturn from 2018 to 2021. I used my best images from each of the years.
Clearly the rings are flattening from year to year. 2018 shows how active the NPR was with several storms in evidence. In 2019 the NPR was a distinct light green colour and the Hexagonal Polar Vortex (HPV) was particularly prominent. By 2020, the NPR had turned a red-brown colour and the lower contrast made the HPV more difficult to see. By this time the blue southern hemisphere of the planet had appeared below the rings in these substantially north up images. My recent image from 2021 shows another dramatic change in the colour of the NPR now a dark green, once again making the HPV easier to see despite the narrowing angle. More of the beautiful turquoise blue Southern Hemisphere has become visible.
I included a GIF animation where you can readily see the changes from year to year in Revision B.

Final
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B

B

Description: GIF animation of sequence from 2018 to 2021

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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.

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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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PixInsight job	n/a
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Saturn 2018 to 2021

Saturn 2018 to 2021

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Image Index:

Contribution Index (beta):

Saturn 2018 to 2021

Saturn 2018 to 2021

Equipment

Acquisition details

Description

Comments

Revisions

B

Histogram

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