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Old 25-07-2025, 12:39 PM
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Quark (Trevor)
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Join Date: Apr 2008
Location: Broken Hill NSW Australia
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Saturn July 18th in good seeing

Hi All,
Imaged Saturn July 18th 2025 in good seeing, have stunning detail especially of the activity in the EZ. These Ch4 data are my best of this apparition.
Have data covering 3 hours of Saturn rotation with 685nm IR data sets at 30 minute centres, have 2 hours of R channel data at 30 minute centres and 3 hours of CH4 data at 30 minute centres. All data has been uploaded to PVOL with links here to the animations.
The evolving structure within the EZ is particularly well seen in the CH4 animation.

http://pvol2.ehu.eus/pvolimages/satu...85nmIR_tba.gif

http://pvol2.ehu.eus/pvolimages/satu...9-09_r_tba.gif

http://pvol2.ehu.eus/pvolimages/satu...47_CH4_tba.gif


Small scale detail resolved in these data

A dark spot at approx Lat+32.5 L3 204.3 in 685nm IR data.
A V-bright linear EZ feature centered on approx Lat+12.1 L1 200.6 in 685nm IR data.
A V-bright linear EZ feature centered on approx Lat+7.9 L1 140.1 in 685nm IR data.
A EZ formation of consecutive bright then dark swept back diagonal features in CH4 data, have never previously captured anything like this.
A large low contrast EZ bright spot at approx Lat-12.5 L1 165.3 in 685nm IR data.
A large elongated dark spot at approx Lat-29.9 L3 219.2 in 685nm IR data.
A bright spot at approx Lat-30.4 L3 227.4 in R channel data.
A bright spot at approx Lat-30.4 l3 174.6 in 685nm IR data.
A large bright oval at approx Lat-43.9 L3 237.4 in 685nm IR, R channel and CH4 data.

NOTE; Each 685nm IR image is from 9 minutes of data (6 x 90s at 70 fps). Each R channel image is from 6 miinutes of data (4 x 90s at 70 fps). Each CH4 image is from 9 minutes of data 2 x binned (6 x 90s at 20 fps). Also consider that this is with a 16” scope.
Attached Thumbnails
Click for full-size image (s2025-07-18_19-01_685nmIR_tba.png)
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Click for full-size image (s2025-07-18_19-08-54_r_tba.png)
115.0 KB15 views
Click for full-size image (s2025-07-18_19-17_CH4_tba.jpg)
28.5 KB16 views
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