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Jupiter with Ganymede 22 October

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#1 Foc

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Posted 23 October 2021 - 07:29 AM

Celestron C8  with 224mc and 2.5x powermate.

 

This was supposed to be a C11 story, but it seems I am not on top of its thermal mass control and collimation yet.  I did not get any worthwhile images from the C11 equatorially mounted on a AZEQ6 but knowing I had some issues with it, I also put out my C8 on the EVO with its trusty old Zwo 224mc.  Setting up and then running 2 scopes for imaging  is often a bit messy and not all went to plan, but I did obtain with the C8 a few nice images of Jupiter and then the approaching Ganymede before the seeing faded a bit too much.  These images taken using the 2.5x powermate from approx 11.30 UTc are capture size and show a bit more detail than I have been seeing lately in my location.

Attached Thumbnails

  • Jupiter and Ganymede around 1140 UTc 22 Oct.png

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#2 John Gauvreau

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Posted 23 October 2021 - 07:32 AM

Those are excellent for a C8 !  Well done and thanks for sharing.


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#3 Foc

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Posted 23 October 2021 - 08:54 AM

Thanks John and all the likers!

 

It is always wonderful to get some steadier skies.  By the time I got to Saturn the steadiness seemed to be going, and an earlier start with the C8 might have seen a nice GRS shot rather than just the departing edge but still some very nice results for this time of the season with a C8.

Attached Thumbnails

  • 2021-10-22-1019_5-U-L-Jup_l6_ap91a.png
  • 2021-10-22-1242_5-U-L-Sat_l6_ap41a.jpg

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#4 cbrunfranc

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Posted 23 October 2021 - 09:27 AM

Great pictures for a C8 ! It is almost possible to see details on Ganymede. 


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#5 Ashman

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Posted 23 October 2021 - 11:57 PM

Nice images Ross!!


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#6 Kiwi Paul

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Posted 24 October 2021 - 02:33 AM

Congrats Ross. Really nice images for a C8 and very nice processing.
Paul
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#7 Kokatha man

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Posted 24 October 2021 - 07:35 PM

Nothing wrong with those Ross..! waytogo.gif waytogo.gif


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#8 Foc

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Posted 25 October 2021 - 02:11 AM

Thanks Cbrun, Ash, Paul and Darryl!

 

The old team of the C8 and 224mc have been doing well, and attached is an update in the lesser viewing of 24 October is a better view of the late October GRS.  You can see a hint of structure within the GRS and the Southern storms are showing nicely but not much detail up North. Edit..should say this image has been enlarged 1.25x.

 

But the new team built around the C11 is still struggling, I do not seem to have my eye in on finessing star calibration atm.  With the C8 I often used an artificial star unless conditions were very good, but I have assumed that short range near horizontal option would option work well with the C11,

Attached Thumbnails

  • 2021-10-24-1051_1-U-L-Jup_l6_ap98a.jpg

Edited by Foc, 25 October 2021 - 02:30 AM.

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#9 revans

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Posted 26 October 2021 - 11:44 AM

These images are great and I love the contrast against the creamy white background.  I've not achieved that.  It is only my third day imaging with the 224MC at F16 with a 9.25 inch SCT.  I don't yet have an IR block filter or an atmospheric dispersion filter although they are on order.

 

My results look muddy.  Is it obvious what I'm doing wrong?

 

Jupiter restudy 3

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#10 Kiwi Paul

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Posted 26 October 2021 - 03:50 PM

Foc, that’s a very nice Jupiter. It amazing how well a C8 can do.
… not to hyjack your thread Foc, but Revans, in Registax 6 make sure you use auto align colours and if you have poor data, use little if an wavelet 1 and focus on wavelets 2 & 3.
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#11 Foc

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Posted 27 October 2021 - 02:50 AM

Hi Revans,

 

In addition to what Paul mentioned, if Jupiter is very low in the sky for you now, you may wish to get an ADC which can help with some color issues. Jupiter low in the sky might also be colored by smoke or haze.  Otherwise registax does a pretty decent job if your image has been captured in the 40 to 80% histogram region of firecapture and I assume other capture programs.  Also if this is a cropped image then perhaps your frame rate is not high enough to get a good signal to noise ratio.   F16 is fairly conservative but this late in the season you should not be imaging much larger than 400x400 with that camera unless you are after the moons as well.

 

And Thanks for the comments on my images, both you and Paul.




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