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Jupiter and Saturn, 7 Oct 2021

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#1 Tulloch

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Posted 08 October 2021 - 12:39 AM

A bit of a strange night for me, it was very still, very clear, jetstream values not too high (in the mid 30's m/s), but the focus shifted around more than I would normally like. However, it was good enough for long enough to capture some good images of Jupiter and Saturn near the meridian (which meant derotation was a must, if only to remove the field rotation).

 

Lots of images to choose from, but I've chosen these, Jupiter with the GRS front and centre, a 10 minute video derotated in WinJupos and processed slightly differently; I backed off on the Unsharp Mask (could easily have gone higher), increased the midpoint level to 1.1 and added a touch of warming filter in Photoshop (yes, I know, I know, but my "add 10% blue" rule is arbitrary anyway smile.gif). Best 10000/90000 frames stacked in AS!3, processed in Registax and Photoshop, shown at 150% captured size.

 

2021-10-07-1057_7-L-Jup_DeRot_AS_F15000_lapl6_ap72_Driz30 Jup925Kiwi r1g1b11 ps3sm150.png

 

Saturn was an afterthought, a 5 min video derotated in WinJupos, best 7500/30000 frames stacked in AS!3, processed in Registax and Photoshop, shown at 150% captured size.

 

2021-10-07-1046_7-L-Sat_DeRot_AS_F7500_lapl6_ap93_Driz30 Sat925LitLes r1g1b11 ps1sm150.png

 

Celestron Evolution C9.25" SCT with TV 2.5x Powermate and ASI224MC camera.

 

Andrew


Edited by Tulloch, 08 October 2021 - 01:44 AM.

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#2 Ittaku

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Posted 08 October 2021 - 12:58 AM

Super work, Andrew. It was very nice having the GRS transit at almost exactly the same time as Jupiter's transit. It sounds like I was luckier with the stability of the seeing where I was compared to you but you didn't waste it one bit.


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#3 HAlfie

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Posted 08 October 2021 - 01:14 AM

Superb wow, it is very nice work especially considering it is with a C9! I looks like taken with a C11!



#4 Vega700

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Posted 08 October 2021 - 03:12 AM

Nice images particularly the Saturn, you really push the 9.25.



#5 Tulloch

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Posted 08 October 2021 - 04:40 PM

Thanks all, the 9.25" does give me a good balance between performance and ease of handling. I still look enviously at the results from larger apertures, maybe one day ... lol.gif



#6 Borodog

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Posted 08 October 2021 - 04:56 PM

You make the 9.25" punch above it's aperture for sure.


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#7 Tim J Fowler

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Posted 09 October 2021 - 05:41 AM

Superb, Andrew! You really are getting some stunning results with your 9.25! Out of curiosity, what is your file size at 90000 frames? I think it would take my PC a week to chew on that, lol!



#8 Tulloch

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Posted 09 October 2021 - 06:08 AM

Superb, Andrew! You really are getting some stunning results with your 9.25! Out of curiosity, what is your file size at 90000 frames? I think it would take my PC a week to chew on that, lol!

Thanks Tim, this 10 minute video for Jupiter came to about 13.5 GB :).



#9 Foc

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Posted 11 October 2021 - 02:25 AM

Very nice Andrew!



#10 Kiwi Paul

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Posted 11 October 2021 - 02:47 AM

Lovely images Andrew.
Paul


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