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Old 16-05-2023, 03:49 PM
Averton (P and C)
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Disparity on the 15 May 2023

There are just not enough hours in a day! Due to other commitments we were only able to have a short time to take images and then didn't get to process them til late.
For the first time since using the SSM there was a very clear disparity between the data collected from the SSM and the actual seeing we experienced. The SSM data gave an average seeing of 1.1 arc seconds with a standard deviation of 0.3. The actual seeing was following the instantaneous values from the SSM ie when the SSM was showing bad figures the seeing was worse and when it showed good figures the seeing was better. However worse and better here are relative to an overall very poor seeing. The images on the screen were unstable and blurry and moving around considerably. The observed average seeing was far more like 2-3 arc seconds at best. We don't mount the SSM sensor at the objective of the scope as recommended but on a separate tripod beside the scope mount. This has never appeared to be an issue in the past but perhaps accounts for the disparity.
Anyway, here are the best images we could extract from the data. The 540nm one is particularly poor in comparison to more recent images.
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Click for full-size image (2023-05-15 full disk mosaic small.jpg)
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Click for full-size image (2023-05-15 full disk mosaic colourised small.jpg)
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Click for full-size image (2023-05-15 full disk mosaic white bg small.jpg)
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Click for full-size image (2023-05-15 full disk mosaic white bg colourised small.jpg)
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Click for full-size image (2023-05-15 full disk mosaic 393nm small.jpg)
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Click for full-size image (2023-05-15 full disk mosaic 393nm colourised small.jpg)
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Click for full-size image (2023-05-15 seeing.png)
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Old 16-05-2023, 03:50 PM
Averton (P and C)
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Close up images.
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Click for full-size image (2023-05-15 NE proms small.jpg)
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Click for full-size image (2023-05-15 NE proms colourised small.jpg)
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Click for full-size image (2023-05-15 AR3306 small.jpg)
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Click for full-size image (2023-05-15 AR3306 colourised small.jpg)
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Click for full-size image (2023-05-15 AR3305 AR3302 AR3301 small.jpg)
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Click for full-size image (2023-05-15 AR3305 AR3302 AR3301 colourised small.jpg)
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Click for full-size image (2023-05-15 AR3305 AR3302 AR3301 540nm small.jpg)
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Click for full-size image (2023-05-15 AR3305 AR3302 AR3301 540nm colourised small.jpg)
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Old 16-05-2023, 06:45 PM
John W (John Wilkinson)
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Interesting features on your shots Peter and Clare - I like the close ups, they show lots of detail. Well done, cheers John W.
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Old 16-05-2023, 07:09 PM
Saturnine (Jeff)
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Love the full disc images showing a plethora of filaments, all the other images are really nice too.
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Old 16-05-2023, 10:58 PM
Averton (P and C)
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Quote:
Originally Posted by John W View Post
Interesting features on your shots Peter and Clare - I like the close ups, they show lots of detail. Well done, cheers John W.
Thanks John

There is plenty to look at when the weather decides to co-operate.
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Old 16-05-2023, 10:59 PM
Averton (P and C)
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Quote:
Originally Posted by Saturnine View Post
Love the full disc images showing a plethora of filaments, all the other images are really nice too.
Thanks Jeff
You can't go past a disk with many filaments on it, always looks impressive to see.
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