Saturn IR-RGB - 28 Aug 2021 (Geof Lewis)

Contains: Solar system body or event

Saturn IR-RGB - 28 Aug 2021

Here is my 1st image of Saturn for 2 years, as it was far too low for me to capture any usable data in 2020.
I was using my new ASI290MM camera together with the x2 Powermate, but that gave an effective F24, much more than the guideline F14 for the small 2.9 micron pixels of this camera. Rather than taking the x2 PM out of the optical train, I opted to capture the data at Bin 2x2 in FireCapture, giving me effective F12, so a much better sampling rate.
The image comprises 4xRGB and 5xIR runs each of 5000 frames, using best 2000 of each for a total of 34,000 frames in the final stack. The stated 50fps is a guesstimated average as the rate varied for each filter, from low 20s for Blue upto around 80 for Red.
The colour image was built in WinJupos, with the IR stack used as luminance at 100% opacity. A hint of the polax hexigon is seen, which is not bad considering that Saturn was still a low 18 deg altitude when transitting from my location.

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Description: Increased saturation in globe.

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Planets - Saturn

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Saturn IR-RGB - 28 Aug 2021

Saturn IR-RGB - 28 Aug 2021

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Saturn IR-RGB - 28 Aug 2021

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